<a href="http://hem.passagen.se/flubba/gba.html" target="_blank" >FluBBa</a> has released an Arcade emulator for the GBA (works on Nintendo DS - with a GBA Flash Cart - and Gamecube Gameboy Player too ), heres whats new
The first version of my Black Tiger emulator is ready for download, the biggest showstoper might be the naming of the roms... MAME has changed the name of the roms quite recently I think so I might have to do some new batch files for the old names as well.