Sony has filed a bunch of patents in October that seem to point towards a dual-screen, touch-controlled PSP2. One in particular appears to back up everything that's been said about the system in recent weeks.
The patents include a diagram for a "handheld device with two-finger touch triggered selection" and all of them state that any upcoming handheld will sport two screens, “Comprising: a case having first and second major surfaces; a visual display disposed on the first major surface; a touch interface disposed on at least one of the major surfaces."
Since Sony's MO at the moment seems simply to copy Nintendo with a complete lack of shame, then sit back and pray for the exact same profit, this makes total sense. Expect a PSP2 with two screens and touch control, then six months later you can wait for an innovative new model that boasts 3D gaming without glasses.
Sony -- industry leaders!