The links crapped out, just check out www.teamxbox.com. They are the "MS Establishes XNA Studios" and the "MS doubles Bungie staff for Halo 3" articles.
The URL's kinda explain everything, but they are short worthy reads. Guess we are getting Halo 3 after all! I'm a little afraid about the number of people working on it though. It has been my experience that when lots of people work on one task, it gets FUBAR'd along the way. Here's hoping that the Bungie core keeps true to the game.