Your post prompted me to find a link for the latest snes9xtyl, and it turns out a version was released just 3 days ago:
Snes9xTYLsmcm 23/05/08 Release - speed increase noted - PlayStation Portable News - PSP Updates
Numerous speed increases, it seems like the prime snes emulator now, but you still have to tweak settings to get some games running smoothly.
There's also "Guitarway to Heaven 4", a homebrew game based on Guitar Hero that's getting good reviews, at
http://www.consolespot.net/forums/ps...eaven-4-a.html