What's better, the KKK or the Nazis? Eating a Giant Cookie or a Castle? "The Catcher in the Rye" or Monica Lewinski?
It's a large social experiment in which you get to choose the 'better' of two items and then see which one's better, according to other people. Also, you can view the top and bottoms of categories, the top and bottom 10 (sex is only the second best thing ever,) and search to see if things you know are up for voting.
I find it comforting to find that most people also think that "Inflatable Pigs" are better than "Unicycle Sumo" and that other people hate driving in Arkansas as much as I do. What's the best thing since sliced bread? It's public merge sort! Whoo!