CodeWord – an excellent word game

I’m really digging this casual game that was posted up to Jay Bibby’s site recently. CodeWord is kind of like the old Mastermind game, where you guess a sequence and are given information on how many correct colors/positions you have, then guess again, etc. Only Codeword uses five-letter words as opposed to color sequences.
So far I’ve won it just a couple times, and I’m still working out optimal strategies. Give it a shot and tell me if you work out any useful methods!