I've just opened a free Sports Betting site, where users compete against eachother on prediction the outcome of football matches from all around the world.
You basically get 200 virtual points upon signup and your job is to make them grow by creating challenges or making single bets. You can also earn bonus points by doing various task on the site.
I got a handfull of corrections coming up and a lot of ideas for new functions - but would love to get some of you guys to test it out.
Sports Betting - Bet virtual points against other users - it's free