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