I read a few online comics as well.
www.pennyarcade.com - nerdy gamer humour
www.whiteninjacomics.com - wacky humour
www.alessonislearned.com - very arty, really creative stuff
www.qwantz.com - a funny comic about dinosaurs, they use the same panel everytime and just change the dialogue, it's hilarious
www.dieselsweeties.com - pixelated smutty romance involving robots
www.patheticinc.com - made entirely with pics taken from google image search