I too have the problem of slow (negligible) button response times. Really sad, since I got this thing PRIMARILY to play MAME games with. Hopefully there's a fix in the offing...

Oh, and while I'm here, it would be really cool if MameCE3 could support the Targus Stowaway keyboard. :-)

Cheers,
ALF (alfarmer_at(@)_hotmail.com)
(remove everything between & including the underscores if you want to mail me)