There was an article on HN a few days ago that explained how Angry Birds was in the iTunes store for several weeks and got no traction. It was only after Rovio

There was an article on HN a few days ago that explained how Angry Birds was in the iTunes store for several weeks and got no traction. It was only after Rovio partnered with a company with a good relationship with Apple and got the game featured on iTunes that it took off.