Some links you might find useful:

• MageGuild's development tracker: http://mageguild.devjavu.com/
  
• Thanks to Aquillion, a MageGuild wiki exists at (SPOILERS WITHIN) http://mageguild.wikia.com/. It's a little sparse yet, but that's just an excuse for you guys to go out and fill it up.
  

If there are any others, let me know, and I'll include them here.