Last night, the Dev-Team released some info about the how to prepare the iPhone 3GS for jailbreaking. However, there wasn’t a guide yet. This morning there is a guide. Below is the info via the Dev-Team. You will want to check out their website for the how-to guide.
“Remember we warned you to stay away from any updates to 3.1 if you want to be able to jailbreak or unlock your 3GS.
Well this is an additional message to all you 3GS owners that would like to jailbreak your device sometime soon, but this advice comes with a warning! A warning that if you accidentally upgrade to 3.1, you will not be able to use Ultransn0w, so please re-read and double check this warning at the bottom of this post before proceeding.
You may have read or heard about techniques to capture files during the iTunes restore process. These will be required to jailbreak your phone in the near future, most of the methods involve icky USB snoops. Well, there is an even better and more reliable method to get your hands on those lovely files.
During the restore process iTunes nicely keeps these oh-so-top-secret-files in a lovely accessible place for us to copy out and backup, that place? /tmp on Mac OS X or %TEMP% on Windows. Thanks Apple — handy!
The downside to this approach is that you actually need to go through the restore process to get these signed files, which has risks if you are anywhere near 3.1 or 3.1 beta :-)
If you are ready to proceed and you know the risks we’ll get down to the nitty-gritty –
So during a usual recovery with iTunes, your signed iBEC is written to /tmp and during a DFU mode restore the signed iBSS is written there also. To be sure, restore in both modes one after another to be able to grab them both. You’ll need to keep an eye on the temp directory and copy it before it is deleted again by iTunes. I’m sure some nice folks will create a tutorial about this, we’ll link to the first person who makes a good one.
Should you choose to accept this mission, act fast, this needs to be done quickly! But again, always, always double check here to see if 3.1 has been released, if is has, then don’t do this.
WARNING!! – DANGER, WILL ROBINSON! – NB! – REMEMBER!
IF YOU CARE ABOUT ULTRASN0W, BE VERY CAREFUL WITH THIS METHOD! Do not attempt this if you have downloaded the 3.1 beta. You do NOT WANT TO accidentally restore your device to 3.1 beta — you’ll lose ultrasn0w if you do! BE WARNED :-)”
If have an iPhone 3GS then you are probably aware of the new feature…Voice Control. Voice Control is a feature that allows you the user to use spoken commands to make a phone call or control the iPod. That is fine and dandy and all but, what are the actual commands! It is hard to tell your iPhone to do something if you don’t know that what to tell it. 
I know some of you are bummed that you can’t jailbreak your iPhone 3GS. Well, if you are craving a new theme, you’re in luck…Apple gave you an option. You can invert your iPhone so that it is white on black instead of black on white. Apple says it is for people who have difficulty seeing black on white or to make it easier to see at night. I say, they are secretly coming over to the dark side! If you would like to change your iPhone’s theme so that it is White on Black just head over to your stock Settings application, the General Option, the Accessibility option and you will see a White on Black feature….just turn that guy On. 
So I got a great idea. Let me know if you hate it or love it (vote below). Every Friday night I will post some of the best/most viewed iPhone videos on YouTube of that week. If you find any throughout the week, send them to me at video@appleiphoneschool.com. I saw this one over at iClarified.com and cnet.com. Now hopefully this is legit, but I kinda think it its. This guy drops his iPhone into a pool and it keeps working. Of course it could be like a flip video in a waterproof case, or even an iPhone waterproof case. Anyone want to test it out?
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AT&T has posted a bunch of videos to their YouTube account of the iPhone 3GS launch day. They include people waiting in line, new iPhone 3GS owners displaying new features and more.
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Below is the basic information about how jailbreaking and unlocking will work on the 3.0 firmware for the 1st gen iPhone, the iPhone 3G and the iPhone 3GS. 
