You can download blackra1n RC2 at blackra1n.com.. There is both a Windows and a Mac version of the jailbreak. Below is a complete list of new features for blackra1n RC2.

** Update — RC2 is out **
Fixed 3G issues
Tethered jailbreak for 3.1 OOTB ipt 8GB and new 3GSes
Fixed Icy issues
Both Windows and Mac
If you used RC1 with success, no need to rerun

If you are an unlocker, “It is super important that people who need the unlock to understand they can keep it only by starting at 3.0 (or earlier) and updating solely to custom IPSWs that don’t update the baseband. For those who have been onboard the “unlock train”, simply install ultrasn0w via Cydia once you’ve restored to your custom IPSW. Don’t forget to turn off the “3G” setting in Settings->General->Network if you use T-Mobile in the U.S.A.”

Below is a snippet from the Dev-Team’s website. However, you will want to check out their blog for full information and the download.

Be sure to read everything carefully before you begin your jailbreak.

Pwnage Pie

Here are some details on our latest version of PwnageTool 3.1.4 for Mac OS X which supports the 3.1.2 release of the iPhone software for iPhone 2G/3G/3GS and iPod Touch 1G/2G.

If you’re already jailbroken (by whatever means), you don’t need to mess around with DFU mode at all. Just create (or get from a friend) your custom IPSW and Option-Restore (Shift-Restore on Windows) to it via iTunes. Don’t enter DFU mode at all. Please make sure you are restoring to the custom IPSW, not the stock one from Apple! For best results, use the latest iTunes (9.0.1) — which includes a nice new application organizer.

This release allows your baseband to remain unlocked at 3.1.2, but it does not unlock a new baseband put there by restoring to official 3.1.x. It is super important that people who need the unlock to understand they can keep it only by starting at 3.0 (or earlier) and updating solely to custom IPSWs that don’t update the baseband. For those who have been onboard the “unlock train”, simply install ultrasn0w via Cydia once you’ve restored to your custom IPSW. Don’t forget to turn off the “3G” setting in Settings->General->Network if you use T-Mobile in the U.S.A.

Note for 3GS users not already jailbroken and stuck at 3.1.x: this version of PwnageTool has a side feature to jailbreak your 3GS. It uses a simple implementation of the usb control msg hole found by chronicdev, geohot, and our very own gray. Now that the hole is public and in use, we expect Apple to close it by the next major firmware update. That’s why 3GS users need to get their ECID hashes for 3.1.x now, and need to stay onboard the “jailbreak train” in all future updates. For more details on what this means, please see our earlier posts or ask in our comments section (moderated by the always helpful @angie and @confucious!).

For the early adopters who ran blackra1n and are having problems with mobilesubstrate, winterboard, diskaid, or ifunbox, you can install a custom .ipsw from PwnageTool to fix these issues. That’s because all jailbroken devices accept a custom .ipsw created by PwnageTool. (However, if you ran blackra1n on a 3G or 3GS that means you updated to stock 3.1.x, and the carrier unlock is now out of reach. We’ll continue to work on a carrier unlock for the latest basebands, but the timeframe for such an unlock is unknowable.)

Note: If you use internet tethering on a carrier that doesn’t officially support it, you’ll lose it by going to 3.1.x. Stay back at 3.0 until a hack for that is developed.

SUMMARY:

* The iPhone 3GS is now supported out of the box in PwnageTool 3.1.4 (or if you have upgraded to 3.1.x in iTunes)
* The iPod 2G is still supported in PwnageTool 3.1.4 but you must already be jailbroken (we’ll update this if there’s a big demand from non-jailbroken ipt2G owners)
* The iPod touch 3G is NOT supported

DETAILS:

1. GOLDEN RULE: If you are using a iPhone 3G or iPhone 3G(S) with ultrasn0w and rely on ultrasn0w to obtain cellular service then you should only update your device with an .ipsw that is made with the new PwnageTool. There are no second chances with this. You need to remember that PwnageTool will provide an upgrade path to newer versions of the iPhone software in the future.
2. Please read all parts of this post before downloading and using these tools.
3. Read items 1, 2 and 3 again and again.
4. At the bottom of this post are the bittorrent files for the 3.1.4 capable version of PwnageTool.
5. PwnageTool will work for the iPhone 3GS
6. PwnageTool will work for the iPod touch 2G
7. PwnageTool WILL work for Original iPhone (1st Generation), the iPhone 3G and iPhone 3G(S) and the iPod touch (1st Generation and 2nd Generation) but NOT the iPod touch 3rd generation.
8. For 3G and 3G(S) users who are Pwned, PwnageTool is your key to updating in the future, just remember to never install an update directly from Apple, always use an .ipsw that has been created with PwnageTool.
9. There is no Windows version of PwnageTool it is a Mac OS X tool only, we are not developing a Windows version of PwnageTool.

There are a few things to note.

- The jailbreak is for Windows users only. No Mac version yet.

- blackra1n does not hactivate your iPhone (fake activate it). So, in order to use this jailbreak you will need to have an iPhone on an official carrier.

- 3G and 3GS unlockers “do not upgrade to 3.1.2 using iTunes if you want to keep your unlock. Baseband cannot be downgraded. Check out the dev team’s offerings.”

- blackra1n does jailbreak the third generation iPod touch however, it is a tether jailbreak. ” In order to boot it, just rerun blackra1n.”

- blackra1n should work on devices using firmware 3.0 and up.

If you fit all those rules, you can get the jailbreak HERE.

Below is what GeoHot had to say on his website.

So, what is blackra1n? blackra1n is a 30 second ALL device 3.1.2 jailbreak. Even the ipt3, but the ipt3 is tethered. In order to boot it, just rerun blackra1n. As far as donations go, they are much appreciated, but not until after blackra1n works for you. I never ask for donations before the tool is released.

Warning 3g and 3gs unlockers, do not upgrade to 3.1.2 using iTunes if you want to keep your unlock. Baseband cannot be downgraded. Check out the dev team’s offerings. Also blackra1n doesn’t hacktivate.

blackra1n.com got a quarter million unique hits, and that’s without any content. This jailbreak is going to be huge!

“And prepare to meet the program that will jailbreak them all. ”

Yep, you got it, he apparently has found a jailbreak that will work with all iPhones and all iPod touches on the 3.1 firmware.

He also says, “no affiliation to greenpois0n. and it’s in some ways the complete opposite of purplera1n. but still 10 seconds. and may work for every version of software *ever*, based on the prettiness of the exploit”

We will keep our eye out for more info.

Download Pwnage Tool 3.1.3 for the Mac

Details from the Dev Team:

The iPhone 3GS is now supported in PwnageTool 3.1.3, assuming the phone was pwned at 3.0 or 3.0.1 – PwnageTool does not support the 3GS out of the box. If your iPhone 3GS has 3.1 preinstalled and is not Pwned then there is no tested jailbreak solution at the moment.

The iPod 2G is now supported in PwnageTool 3.1.3, assuming the iPod 2G was pwned at 3.0 or 3.0.1 – PwnageTool does not support the iPod 2G with 3.1 software out of the box.

GOLDEN RULE: If you are using a iPhone 3G or iPhone 3G(S) with ultrasn0w and rely on ultrasn0w to obtain cellular service then you should only update your device with an .ipsw that is made with the new PwnageTool. There are no second chances with this. You need to remember that PwnageTool will provide an upgrade path to newer versions of the iPhone software in the future.
Please read all parts of this post before downloading and using these tools.
Read items 1, 2 and 3 again and again.
At the bottom of this post are the bittorrent files for the 3.1 capable version of PwnageTool.
PwnageTool will work for the iPhone 3GS assuming you have already Pwned it at 3.0 or 3.0.1
PwnageTool will work for the iPod touch 2G assuming you have already Pwned it at 3.0 or 3.0.1
PwnageTool WILL work for Original iPhone (1st Generation), the iPhone 3G and iPhone 3G(S) and the iPod touch (1st Generation and 2nd Generation) but NOT the iPod touch 3rd generation.
For 3G and 3G(S) users who are Pwned, PwnageTool is your key to updating in the future, just remember to never install an update directly from Apple, always use an .ipsw that has been created with PwnageTool.
There is no Windows version of PwnageTool it is a Mac OS X tool only, we are not developing a Windows version of PwnageTool.

Read the full release info from the Dev Team.

Remember, PwnageTool is the jailbreak that is Mac compatible. Also, PwnageTool 3.1 only works on the 1st gen iPod touch, 1st gen iPhone (iPhone 2G) and the iPhone 3G. We are still waiting for a jailbreak for the iPhone 3GS, the 2nd gen iPod touch and the 3th gen iPod touch as well as a version of the jailbreak that is PC compatible (the PC compatible version of the jailbreak is called redsn0w).

Update 2: Unlocked users on the 3G will probably notice that the name and/or logo of their carrier is missing, but they still have full bars and a signal. So far this seems to be purely a cosmetic issue and it doesn’t impact your signal or coverage. We hope to have this issue “fixed” when we release the 3GS compatible version of PwnageTool. This is very likely tied to Update #3…

Update 3: As of 3.1, the *.ipcc carrier bundles are signed, and you can no longer force tethering capability simply by crafting your own bundle. The good news is this obstacle can probably be overcome by virtue of the jailbreak. But so far that extra hack is not part of the PwnageTool custom IPSW creation.

See full article HERE.

This is the low down on our tools for use with the 3.1 firmware from Apple, please read the whole post in full before attempting anything. Because of changes with Apple’s update techniques this will be a multipart release, starting with the initial release of PwnageTool for Mac OS X – this application supports the iPhone 1st Generation (2G), The iPhone 3G and the iPod touch 1G. NB: THIS DOES NOT SUPPORT THE 3GS OR NEW IPOD TOUCH. redsn0w for Mac OS X and Windows will follow sometime in the near future, please don’t bug us about it – we’ll release when we have something ready.

1.GOLDEN RULE: If you are using a 3G iPhone with ultrasn0w and rely on ultrasn0w to obtain cellular service, then you should only upgrade to 3.1 with a PwnageTool created .ipsw. – Stay away from Apple’s direct updates as described here and here please get up to speed on the whole subject by reading the information contained in these posts.
2.If you have an original iPhone (1st generation) then 3.1 unlock works with this PwnageTool release. iPhone 3G users upgrading to 3.1 will need to continue using ultrasn0w with a PwnageTool created 3.1 .ipsw
3.Please read all parts of this post before downloading and using these tools.
4.Read items 1, 2 and 3 again and again.
5.At the bottom of this post are the bittorrent files for the 3.1 capable version of PwnageTool.
6.This app is suitable for the recent 3.1 release.
7.This version of PwnageTool will NOT work for the iPhone 3GS.
8.PwnageTool WILL work for Original iPhone (1st Generation), Original iPod touch (1st Generation) and the iPhone 3G.

Full article HERE.