A friend invited me to join a closed group on Facebook called "The Final Fab Four," that matched up Beatles songs like March Madness. The guy who organized it created a bracket on Google Docs, and then set up polls on FB so that people could cast their vote on which songs move on to the next round. Each round lasts two days. It's a cool way to bond with other Beatles fans, and a way to agonize over songs you love ("Sgt. Pepper" vs. "Across the Universe?!").
I know people are always creating different U2 song polls on these forums, and I don't remember if those polls have ever been set up like a college basketball tournament. Maybe they have. If not, someone (not me!) should try and set one up. Whether something like this happens or not, this was a fun way to spend a Tuesday night.