Info from Ste:
The latest “Community Sources” package changes the location of my repository’s XML file. Instead of downloading it directly from my site, it will download it from a world-wide caching system. Not only will this eliminate nearly all the traffic to my main server, but it should update faster, for you, as you will get it from the cache closest to you.
Right now, the XML file will age out of the cache after 12 hours. This means that if I add/update a package, you might not see it for as long as 12 hours, no matter how many times your might manually refresh. Once I’m satisfied that this is working ok, I will tweak the settings so that it ages out of the cache much quicker – probably down to an hour instead of 12.