Wow. This is huge. This speaks volumes between the lines and in the lines themselves. Just as Halo 3's $300MM USD is ballyhooed all over the press.
Just when there's all this buzz about how even enterprise applications are should become more game-like, and just as Microsoft must be getting desperate to show they can innovate, Bungie obviously takes off in order to be more innovative with game development than they can be as part of Microsoft.
Todd Bishop's Q&A is great. Maybe he could interview U.S. presidential candidates?