Cave Story, a sleeper hit of last year, is making the journey to 3DS. The press release is vague on some details, but it sounds as though Cave Story 3D will be an expanded version of the original, possibly with new areas and features, rather than a port with quick and dirty 3D effects. Description from the press release:

"Cave Story 3D is a side scrolling action adventure game inspired by the fan-favorite 2D original. Now in a full 3D world, Cave Story takes the proven 2D action, exploration into stereoscopic awesomeness. You wake up in a cave with no idea who you are or where you came from, but you know you must help a cute race of rabbit-like creatures beat the crap out of some crusty old doctor."