No doubt you know that Angry Birds is a bit of a sensation. The mobile game has been downloaded more than 30 million times across different platforms, some 12 million of which were paid downloads from iOS devices. The game is also on Android, but the game is free there, supported by ad revenue. Rovio Mobile, the game’s developer, says it expects to see monthly ad revenue of a million bucks by the end of the year.

Check the video from Google’s new admob mobile success stories:

I’ve heard of mobile developers doing well – just look at Tapulous – but Rovio and Angry Birds might be the first instance we’ve seen of a developer monetizing its product so well. Rovio is turning huge profit from the game, but also turning around and merchandising the product into plush toys and soon, a kids television series.