April 7, 2008 - GrooveStep Digital Music Studio is a revolutionary ultra portable music making application for the Nintendo DS. GrooveStep features an easy to use step sequencer for pattern based music making. You can make beats, melodies and full songs with GrooveStep.
That's right. A rival that gives you free. Not as fancy looking but from the looks of it, it nearly resembles the KORG DS-10 functionality. Whatever it is, I'm surely want to try this when it's out.