<a href="http://hem.passagen.se/flubba/gba.html" target="_blank" >FluBBa</a> has updated his Sega Master System emulator for the GBA (works on Nintendo DS - with a GBA Flash Cart - and Gamecube Gameboy Player too ), heres whats new

V0.9 - 2005-09-26 (FluBBa)
Added support for the GG BIOS.
Added config for using Select as Reset button.
Fixed Shanghai 2.
Fixed Ryu Kyu.
Fixed Space Gun.
Fixed a bug in joypad reading (Street Fighter II).
Optimised mapper detection.
Optimised sound mixer.
Optimised CPU abit.

Download Here --> http://gbaemu.dcemu.co.uk/smsadvance.shtml