Non-Americans: Everything you need to know about baseball is here: "Take me out to the ball game"! At O Mundo de Claudia. The most insightful post about an abroad experience I’ve read this summer (until now). With the plus of being true public service, after all who doesn’t identify immediately with the first sentence?
"(…) I had never understood the rules or even why is it such a cult sport in the USA."
What the hell is this?
Find all about it at O Mundo de Claudia 
P.S.: I use this opportunity to recommend it to the fellow net-neighbours of The Marginal Revolution (as a "gift" on account of their recent post on soccer). For the sake of cultural exchange, naturally.