1up Yours this week (11/09/07) mentions a couple of "hot rumors" near the end of the podcast. Here are the transcripts from the relevant segments in the podcast:
Shane (host/EGM editor): "I won't go into exacting detail because these rumors haven't been confirmed but they're definitely swirling around. They're probably gonna break next week. So a preview of what you may be seeing next week. A big Microsoft first-party title that has been in the works for a very long time that people are very excited for, sounds like it's being canceled. And a Microsoft executive who's pretty high up, who's been a voice for the company, sounds like he's on the way out. (1:58:11-1:58:37)"