Namco Bandai have two portable Ridge Racer games coming up — Ridge Racer 3D for the Nintendo 3DS and Ridge Racer Accelerated HD for iPad.
While Ridge Racer 3D is a Nintendo 3DS launch game, Accelerated is already available for the iPhone for $4.99. Accelerated HD appears to be the same game, updated for the iPad.
Ridge Racer 3D:
Ridge Racer Accelerated HD: