I'll eventually get some more information in here, but for now, this is the first dump I've made.
If you want to flash these builds, see the guide here.
April 2nd, 2009 - master
Basically the same as the pulls before. New home screen, opencore disabled, media borked.
April 3rd, 2009 - master
Same as above, 1 patch. A few miniscule changes.