I had a concept of a folding screen portable long ago, back in 2001 if I remember correctly. (Sorry folks, Nintendo didn't invent the hinge along with the DS) Above is a sketch I did on a PDA (and still have in my Outlook notes) Originally it was going to have fold-up "joystick handles" with a D-pad on the left and a trigger on the right. Cut to 2006 and I get the urge to build one again, for a person wanting an Atari portable.