I just rolled a new and improved BBB MAME image. This version is a minor update and includes the latest version of Debian and some tweaks to the MAME config that should improve game play. Special thanks to user berzerking for the desktop background.
Grab it from here: http://gencarelle.com/public_files/mamebone/mamebone-0.7.rar
Next build will hopefully see an improved front-end… pyrharckade looks very promising.