The Fanyard is a great little web application that is growing and starting to get quite big. You the knowledgeable sports fan get to pick the teams you think are going to win and also you predict the spread of the win.
From a usability point of view it’s simple, you click the team you want to win and you enter the spread amount. You can then leave an optional comment or reply to what others think. Everyone is graded weekly and overall so you can start anytime. Right now the FanYard cover NFL, NBA and college football (NCAAF) and basketball (NCAAB).
It’s turning out to be quite a cool little social network of sports fans. I’m on there as iheartbaseball, go check it out.