You're slipping there Mike, excellent question though. I usually fly Cayman Air down there. They do a good job as a rule. Saw something about $178. fares out of Miami today?!
http://www.caymanairways.com/specials/
More about Grand Cayman at:
http://fksa.org/showthread.php?t=8093
If you search this site under "cayman" you'll find more info still.