Personally, I think this is the best Sony PSP phone concept yet! Just look at it. It has a sliding keypad, or rather a game controller, which you can hide under the touch-sensitive screen whenever you quit playing and use the device as a phone.
Sony Ericsson, why don't you guys take this model into consideration? It's a real gold mine, people! Don't get left behind by Nokia and Apple!
(More photos after the jump)