Sony's thunder was stolen though by a video magazine releasing info on the new 16GB PSP Go, ahead of the official announcement expected on Tuesday.

As had been widely rumored, the PSP Go will have a sliding form factor like the Mylo, Sony's ill-fated Internet communicator device. The new handheld--which does not sport a second thumbstick--is shown several times in the video, which features Qore host Veronica Belmont and John Koller, director of hardware marketing at Sony Computer Entertainment America.
16GB PSP Go revealed early, new PSP MGS confirmed? - News GameSpot E3 2009