By both screens I mean instead of one housing your inventory or a map they're both used for simultaneous game play, for a light / dark world type of game play.

honestly, it looks a little janky :p

I still haven't hopped on the DS bandwagon. Recently snagged the Metal Gear Solid: Peacewalker PSP. So far I like the game selection of the PSP. Was actually the determining factor in purchasing it over a DS. Seems to be more RPG's and 3PS types on PSP. Though DS did just get a new Dragon Quest.