Now, Atari and Silver Birch have announced a publishing deal to bring N to the PSP, cleverly titled N+. The game comes packed with over 500 levels, including 50 user-created stages from fans of the original game. The PSP incarnation doesn't appear to contain any additional content over the free PC/Mac/Linux game, but portability (and a decent PSP title to own) might be the biggest selling points.
N+ has also been announced for Xbox Live Marketplace and is scheduled for release this fall.
[Via PSP Fanboy]