If you love baseball and have an iPad, you need Pennant, a project by Steve Varga. The app lets you explore every game and play since 1951. See the numbers for your favorite player or team with just a few taps or swipes while you're plopped on your couch watching the game. Imagine: one hand with an ice cold beverage, iPad on your lap, and the game on in front of you.
Check out the app in action in the video below.
If I had an iPad, I'd get this app in a snap, and I'm not even much of a baseball fan. Varga clearly is. Now if this existed for basketball, I might have to consider getting an iPad.
As an aside, it's surprising that there aren't more apps (or sites) like this, considering there's so much consistent and reliable data for sports. That's a mass audience right there ready to consume just about anything related to their teams.