Going to pick the 3DS here.
Really I guess the reason they haven't announced a PSP 2 is maybe they were waiting to see what Nintendo did. Try and play it like that. I know PSP 2 will probably have more hardware capabilities and functions but not sure if they'll go a 3D route. Either way I don't think it is a good way to compete with 3DS nor a good way to compete with the iPhone. So really don't know what Sony is doing here.