Looking for a cheezburger to go with your iPhone? You're in luck. The goofballs (and I say that with fondest affection) over at ICanHasCheezburger have created an official iPhone app so you can cart the cats around with you wherever you go. Just bookmark this on your phone's Safari browser and whenever you visit you'll be greeted by the 30 most recent lolcat pictures. It even updates every time there's a new post.
Don't have an iPhone? To dream and drool, check out the demo page the creators put together (it's only viewable on a Mac).