Oddee.com-Good for the best or worst of a subject i.e. 10 of the Dumbest Gadgets Ever Made (lately it has been a little risque but its usually a really good g rated site for fun facts)
2leep.com-The site that puts every random fact, picture, or embarrasing moment into a wonderful list.
Failblog.org- If you ever have had a bad day look this up to see people that fail even more than you do. (My suggestion would be to click on the G-rated tab on the right of the website. Enough said)