AgentQ has updated the port of ScummVM to the Nintendo DS, heres whats new:

CD audio is supported using IMA-ADPCM compressed WAV files
Direct file system support now works on the M3 and Supercard
An on-screen keyboard to name saves
Interact with the zoomed view by swapping the screens over with X
Zoom in/out by holding L and pressing A or B
Scroll the screen with the pen while holding L
Improved the way the zoomed view follows the talking character
Music support in FM TOWNS games
Sound volume improved, and sound glitching fixed
Left handed mode
Help screen added
D-pad controls in the front end
Numerous other bug fixes

Download here --> http://nintendo-ds.dcemu.co.uk/scummvmds.shtml