According to Play-Asia, a new version of the GP2X is coming out in October. It will have a touch screen, a new D-pad, and several built-in games (most notably Cave Story).
It will also be white. I guess the only thing they forgot was the second screen.
http://www.play-asia.com/paOS-13-71-d1- ... -277b.html
The official GP2X site is here, though there's nothing on the new system yet.