I was just fooling around with bit kong today, it's an online gambling site where you can win up to 10 BTC by clicking the right icon 10 times in a row.
Something i noticed was the site has a free bitcoin faucet, which pays about 500 satoshi each go which is pretty high as far as bitcoin faucets go.
You can't withdraw this bitcoin, although you can gamble it and try win enough to withdraw ;)
Give it a crack here, only takes a couple of seconds to sign up via facebook - bit kong