If you havn't heard of the latest internet craze, Moola.com, basically what it is is a series of 1v1 java games where you bet money... but the trick is you don't pay for anything the website gives you money and you can keep doubling it and you can cash out at anytime. (and you don't have to bet all your accrued money either.)
So the way they make their money is through an affiliation program and making you watch a commercial before each game. It must be doing well cause in 1 month they've got ten times as many companies advertising with them. It's still in the beta phase so you need an invite.
http://www.moola.com:80/moopubs/b2b/exc ... 4e54513d-2
This is my refferal link, anyone who's interested can use it.
I think it's a fun way to waste time, between projects.