I just picked up an EM-500, so of course I just HAD to try out MAME on it. Pretty cool, even though nothing seems to run well with sound (sounds like ass on the built in speaker anyway). Two sticky points though:

1. The 'record' button does exit to the menu, but it also fires up the 'notes' application -- is it supposed to do that? Pretty annoying.

2. Some romsets from my current MAME collection don't work (Pacman, Frogger). Is that due to the older version of the MAME source? If it is, any pointers on finding older versions around? or maybe diffs for the current versions that just have the changes?

Overall though, very cool!