I would love for JROK to put his great mind towards an MCR replacement. Think of the games it could save and do multi of:
Demolition Derby
Discs of Tron
Domino Man
Journey
Kick/Kickman
Kozmik Kroozr
NFL Football
Satan's Hollow
Solar Fox
Tapper
Timber
Tron
Two Tigers
Wacko
The original boards required 2x Z80's and 2x AY-3-8910's so there could be up to 6 socketed chips (with code eprom, batt backed memory), but would be a tremendous replacement for the failing SSIO,CPU and Video board sets and those aweful interconnects of all flavors.