Angry Birds is a 99 cent app that I got for my iPhone a week ago and I am addicted to this game. Apparently I am not the only one, since about 10 million others have joined me. Basically, you slingshot birds into structures that are housing green pigs. It sounds very weird, until you play it and you find yourself addicted to this game. Simple premise, but it has many levels and options.
An opening screen shot.