Y0j1mb0 posted some info
about in game XMB possibly coming in the Playstation 3's upcoming FW 2.4 update. Looks like it's probably true.
Looks pretty legit to me. I am very aroused now.
Note: Videos are not accessible, and videos don't pause when you press the ps button during playback. Also, I wonder what that "Signal Verification" is under the "Game" tab.