I'm a sucker for maps and geography and I love baseball far more than any one person should. Combine maps and baseball and you can bet I'm posting it all over the internet.
MLBfarm.com put together a Google map showing the birthplace of every current professional baseball player. I unofficially count 9,049 of 'em, so this includes the minors and everything. Roughly 300 players per organization. The map itself is sortable by team and you can zoom in to see who are the players in each location, stuff like that.
I can't embed the map here -- that map above is just a partial screenshot -- otherwise I would. Just make sure you click the link to check it out. Pretty fun way to kill some time.