Ha, wouldn't a port of Gauntlet 4 rock? Gauntlet is one of my favorite games ever, and I have seriously considered buying an arcade of it. At the very least it will probably be the most played game on the MAME machine I eventually build... wven the newer Gauntlets are awesome. Only 3 on the ST kind of stunk, and that one would be awesome with the TT030 or Falcon speeds!
Atari 8Bits: 800xl, 600xl, XEGS, 800, 130xe, 130xe (fully upgraded (soon!))
Atari STs: 1040STf (broken shifter), 1040STe, Mega STe, TT030, Falcon (CT60e, SuperVidel)