I know it would be kind of overkill and maybe even pointless, but what would you think of a MAME cabinet with a Quarter Queue feature just for kicks? This would be for those hard core arcade enthusiasts who make use of their coin doors for putting credits into MAME, you could set it for transparent mode (normal, insert a quarter and it goes to the game) or activate the Queue and it would take the quarter credits into a counter which you have to press a button to transfer into the game when you're ready...this way you can insert coins between games while in the front end, or insert coins while playing one game and use them in another game when you wish.....
I know it's kind of pointless but if you had the parts laying around to build such a feature, would you bother with that sort of idea?
Maybe this should have been a poll instead of a topic...hmm...