Other comments:
1. It was listed as "Uruguay at France", which doesn't make any sense... I assume that was designed for American sports where there's always a home and away team?
2. I don't really care that some guy checked in and earned one point, but that's what the feed seems to be made of right now. Nor do I particularly care that someone picked someone to win.
3. Nothing seems to be updating properly -- I'll chalk that up to an overloaded server.
4. I assume that one need not be physically present at the match in order to "check in"? Perhaps this should be made clearer.
Ultimately I probably don't care enough about sport to be your target market, but it would be nice to have a service like this so I can follow the few sports I do follow (pretty much limited to the World Cup and the Formula 1) which I can't get on TV.