PSP298 has released a new Gameboy Advance emulator for the PSP, this release has great speed although not 100%, it uses the full 333mhz speed, it s full screen and it also uses what looks like is the Rin file selector and can be fully configured.

Heres some screens:





Download here --> http://psp-news.dcemu.co.uk/pspgba.shtml

This is a much better GBA emu for the PSP than the other one and the speed will impress.