Sony will release new a PS3 firmware update tomorrow that will enhance the PS3's Blu-Ray movie playback, and add that anticipated AVI support we've all wanted.
Firmware version 2.10 will add 'Profile 1.1' Blu-Ray playback, which is the technical name for a new standard of Blu-Ray films that support new features such as picture-in-picture playback.
DivX support will also be added, along with VC-1 (wmv) video support, so you can finally watch all those perfectly legal videos on your PC through PS3.
Sony's also adding an option to change your voice online. Long-time xbox Live fans will remember Voice Masking on Xbox, which was removed when whiny kids doing constant impressions of Arnie with a robot voice got too much to bare.
Okay, so there's no in-game XMB.
Source: http://www.computerandvideogames.com/article.php?id=177710