Lien has updated his Drum app for the DS, heres whats new:

PAlib Logo in splash
Menu with some options (WIP, not working)
Better Drums images...

What Im gonna do in final version

Saving compositions
Play over a song (I'll think about it)
Better quality sounds
Two Drumset option (simple-complete)vTwo sound posibilities (Acustic-Electric)

Download Here --> http://nintendo-ds.dcemu.co.uk/drummers.shtml