Kotaku reportsthat after TGS, Sony held a private event that showed up the PSP2 and now some of that info has leaked out.

The rumors of the PSP2 are as follows:

-Screen 1 inch larger then current PSP
-Touch screen
-HD screen and much sharper
-Touch panel on the back of the unit is described as looking like a big mouse track pad
-Roughly the same size as the PSP-3000
-Flash Media Support
-Launch by 4th quarter 2011
-Some heating and battery balancing issues still be worked out
-Hardware not finalized
-Dual Analog Sticks