A friend of mine launched his idea recently. "Are You Watching This"
Seems like a cool idea. The way I understand it (don't hold me to this) the games (NFL, NBA, NHL, NCAA, Nascar, etc) are voted in real time before and during the game by users of the site. Depending on the threshold you set, you get sms'ed, paged, emailed when games meeting your threshold are found.
So the next time, it is bottom of the sixth and the no-hitter is starting to look like a reality you will be notified. You will no longer have to curse yourself for being stuck in the line at Ikea for that 45$ chair and missing the game.