The iPhone/iTouch app Hold 'em Legend is available in the iTunes App Store for $2.99.
Total Rewards (Harrah's player's club) and the World Series of Poker are running a promotion for those who enter their contest before April 16.
Prizes include:
Grand prize (1): 16g iPad
1st place (2): 8g iTouch (though if we're playing the app, it kinda means we already have an iPhone or iTouch)
2nd place (5): WSOP poker chip sets
Consolation (10): $25 Total Rewards gift cards, for use at any Harrah's property
Not a heck of a lot of prize offerings, but note that you don't actually have to buy the app to enter the contest.
To enter, visit this link and fill out your name, phone, email, and Total Rewards # (you must sign up in person to receive one if you don't already).
