www.chasebook.co.uk - Ever been peed off with someones less than quality driving skills? Well then leave a message for them against their number plate, and get notified if anyone leaves a message about your car, awesome!
Programmers re-usable code. There's so much that you shouldn't be rewriting from scratch, yes there is techie fun to be had writing various things from scratch, but you can get a far greater sense of achievement when you put together something very quickly by reusing code that's already out there.
The cut scenes of Full Throttle (an old Lucasarts point and click PC game) all edited together in one video, awesome!
wiifail.com - Ultimate wii fail!!! Ah man, hope thats covered by insurance.
Check out variations of the theme of the classic "Oh look, I'm holding up the leaning tower of pisa!"
True stories in one sentence, spent a while on here, this is really good.
Medley of childrens tv shows, from my childhood, this is brilliant. If you don't hear anything turn the sound up on the little volume icon next to the play button.
Look at these Nintendo games recreated in lego
Some really useful html tags you may have never used!
Twitter acronyms, yeah... I think I know RT that's about it...
Twitter characters - you can use special characters to do little pictures in your twitter posts, cool idea!
Really obscure medical conditions, some are funny, some are horrible and some I'm sure can't be real.