Though still a rumor, its got quite a bit of detail to just leave it at that.

Microsoft is (for the sake of the article, remember "rumor") bringing out a revamped xbox 360 dashboard. The launch will come after a live 5 hour televised event on G4, and Xbox live members will be able to stream it. The ideas that they are coming out with are pretty interesting. The story goes that at midnight September 25th, the update will include a Sirius Satellite radio service for a price, a music store, like itunes, and a "Mad Libs" section. no idea, what that is.

If that wasn’t enough, this will definitely get you going. During that time, Microsoft will announce 12 new exclusive games, or games that will be on the Xbox first, Assassin’s Creed 2, Mass Effect 2, a new Conker game and two new Halo titles. Also, six free original Xbox games will be available to download, with Halo being one of them.

OH THE HUMANITY

NEWS UPDATE: According to G4 officials, they have no idea what people are talking about, and they have nothing planned on September 25th. So apparently… everyone is a liar, WE SHALL SEE G4! I’ll be there on Sept. 25th. [Kotaku]

[VGChartz] [Joystiq]