The new SNES Myth Shell v0.50 is now available for download. You can find it at the same place as before: http://code.google.com/p/neo-myth-menu/downloads/list
A short video showing some of the features: http://www.youtube.com/watch?v=aeSirFrv5og
Info taken from the readme (key parts in bold):
Using SD cards**************
Take an SD card that has been formatted with FAT16 or FAT32.Create […]