Quick summary about VBA-GX:

Google Code Wrote:"A Game Boy/Game Boy Color/Game Boy Advance emulator based on VBA-M, ported to the Wii and GameCube. The code is a continuation of Softdev and emu_kidid's efforts, and uses libogc and devkitppc."

Downloads in this page at Google Code:
http://code.google.com/p/vba-wii/downloads/list

readme Wrote:[What's New 1.0.7 - January 27, 2009]
* Updated to VBA-M r847
* Corrected sound interpolation
* Faster SD/USB - new read-ahead cache
* Removed trigger of back to menu for Classic Controller right joystick
* Fixed a bug with reading files < 2048 bytes
* Fixed GBA games on GameCube
* Fixed homebrew GBA games on GameCube
* Fixed some memory leaks, buffer overflows, etc
* Code cleanup, other general bugfixes

Seems a discussion thread for version 1.0.7 was opened by Tantric at Tehskeen after the GoogleCode downloads were updated.
http://www.tehskeen.com/forums/showthread.php?t=10405