Check out the Oracle of Bacon based on the whole "six degrees of Bacon" game... and if you don't remember what the rules are, here's a description:

The object of the game is to start with any actor or actress who has been in a movie and connect them to Kevin Bacon in the smallest number of links possible. Two people are linked if they've been in a movie together. We do not consider links through television shows, made-for-tv movies, writers, producers, directors, etc.

And for all you baseball fans... Oracle of Baseball!