Beyond Guitar Hero
The Korg DS-10 brings two monophonic synths and a basic beat box to the Nintendo DS. It has a 16-step sequencer that can be programmed via keyboard-via-touchpad or a kaoss-pad-ish interface, and you can also sync up to 4 DS units (your own handheld Kraftwerk-lite?). Currently available as an import-only title (although the entire program is in English), although a domestic US release is scheduled for October.