Infantile Paralysiser have released a new version of their Moonshell App, heres more info:

MoonShell supports:
NSF/MP3/SPC/GSM/MOD/S3M/IT/XM/MTM/OGG/DPG Playback
Jpeg/BMP/PNG/GIF/Text files Viewing

Info from this release:

Interchangeability concerning PassMe/FlashMe has been improved.
When the cover cap was shut, PowerLED was blinked.
WavePlugin was supported. (Only no compression LinerPCM.)
SPCPlugin was speed-up.
Various points of DPGPlugin and dpgenc were corrected.
M3SD was supported and detected automatically.
SCSD automatic detection routine has been improved.
The file reading bug was corrected, and MODPlugin/GIFPlugin etc was corrected.
The window memory was dynamically allocated. unused memory is liberated.
When the still picture was displayed, it was possible to zoom and reduce with X/Y button. (65%～800%)
When the music reproduction ends, power supply OFF can be done.
Going up to 400% of the volumes other than movie can be done.
The problem misjudged to CrashMe (DS Bricker) by the virus checker might be able to be evaded.

Download Here --> http://mdxonline.dyndns.org/archives/nds/