Mental Floss

Mental Floss is a website dedicated to Trivia Facts.  It is a web version of their magazine.

They describe themselves as smart, but not too smart: 

"For the record: mental_floss magazine is an intelligent read, but not too intelligent. We're the sort of intelligent that you hang out with for a while, enjoy our company, laugh a little, smile a lot and then we part ways. Great times. And you only realize how much you learned from us after a little while. Like a couple days later when you're impressing your friends with all these intriguing facts and things you picked up from us, and they ask you how you know so much, and you think back on that great afternoon you spent with us and you smile.

And then you lie and say you read a lot."

Bonus points for tamping down the smug factor.

My favorite part of this site is the Cocktail Party Cheat Sheets page. CPCS are condensed forms of the same interesting facts you hear over and over. An excellent study tool for all your trivia competition needs.