Many people were hoping (even expecting) PSP2 to be unveiled at this year's E3, which kicks off today. And although this may still happen (though unlikely), a video was leaked a few days ago unveiling Sony's newest PSP iteration, the PSP Go. Although this isn't the PSP2, the design of the PSP Go is very different than the PSP3000 (the current version of the PSP). The PSP Go is all about greater portability, featuring a 3.8" screen (compared to 4.3" on the PSP3000, but still larger than an iPhone's 3.5" screen), no UMD drive, 16GB of built-in flash memory, a sliding screen that unveils the controls, and Bluetooth.
Although the lack of a second analog thumbstick will surely anger the millions of people that have been clamoring for one since the PSP was first released, again, it's important to note that this is NOT the PSP2. All games for the PSP Go will be compatible with the PSP3000, and in fact, the PSP3000 will continue to be produced and sold. The PSP Go is simply an alternative for people that want a smaller handheld gaming device and don't mind having to download all their games (due to the lack of a UMD drive). Although details haven't been released, it's also a good bet that the battery life will be significantly better than the PSP3000, as the PSP3000's UMD drive is a large source of the batter drain.
Lastly, for you Metal Gear Solid (MGS) fans, in the video, John Koller, director of hardware marketing at Sony Computer Entertainment America, confirmed a new MGS coming to the PSP, which will be available for download on PlayStation Network for the new PSP Go.