I've not spent much time on MAME-PSP recently, and it seems it has shown! MAME4ALL has been ported to the PSP; something I probably should have looked into myself.
So what are your thoughts on this, my fellow arcade fans!
I will keep my promise. I will release a BETA of MAME-PSP that runs 30 games near flawlessly very soon, just give me a day or so to clean up a little. It's worth the wait I promise