This is ambitious and a bit ridiculous... but it must have been a lot of fun to work on. Bold Poker.
Something I'd like to see is for an app that is as well-designed as this to handle what is arguably the much more difficult part of poker - the betting. I can't tell you how many times I've had split-pots and difficult-to-count bets that a machine could do in seconds.
/via John Gruber.