What websites would you recommend for killing time? (please read details before answering)

Purely for entertainment reasons. For example I have just discovered cuteoverload.com and it kept me entertained for hours on one of my late shifts at work!!! I don’t want to know about obvious websites (Fluther, Facebook, Myspace for example) but I love sites like Postsecret.com or sites that are similar to Fluther (questions and answers). Do you have a personal favourite to visit once Facebook, Fluther, Twitter etc have all been exhausted?

I did do a search to see if a question like this had already been asked RECENTLY and had no luck. Apologies if you know different!