A while ago in a must have app discussion myself and roofmonkey recommended iFunny. At the time it had been pulled. It is back however comma in the app store. Get it while you can.
http://itunes.apple.com/us/app/ifunny/id429610587?mt=8&ls=1
http://itunes.apple.com/us/app/ifunny/id429610587?mt=8&ls=1