Played around a bit and I like the Satoshi Game
http://bitzillions.com/satoshibones/doge
ATM I'm doing a similar one, if you want you can give it a try.
It's a 50/50 Chance (Coin Dice Head or Tail).
Payout is 1.95 hardcoded ATM


Head: Ec75W5kuh5W3tXW4NT3x3EQa69fXTmaYnT
Tail: EZ69T5V3vi6N5Guzk2APS862LmMZTdjDS5

Wallet is loaded with 5k Coins

Important: Min Bid is 1 ETHAN, Max Bid is 5 ETHAN
ANy other ammount currently gets as donation, need to change that bit