With 3.99 pretty much wrapped up code wise (there's a few bugs I'm willing to live with) I'm working on the client-side engine, and ioq3 just moved over to github. I'll be making the fork off of it, it's just for the stuff for bots mostly, and wfa-specific. Since it's a fork and it's mainly botlib, it'll be open source anyway.
http://ioquake3.org/2013/01/01/happy-new-year-ioquake3-and-github/