Crissm25 sent me his source and we've been working on it all night.
Features:
-Plays music/videos from sd, sdhc, usb 2.0, and dvd (usb 2.0 and dvd require the mplayer ce cIOS)
-NTFS support (Thanks to libntfs)
-SMB support
To do:
-libwiigui GUI
-port libgpod to wii for iPod support
-Built-in...