The mobile game Angry Birds has been downloaded 36m times

"With more than 36m downloads under its wing, Angry Birds has quickly become a mobile gaming phenomenon.
And now the popular puzzler is set to move into the living room, with versions for the Xbox 360, PS3 and Wii scheduled for a 2011 release.
In less than a year, Angry Birds has captured the imagination of millions of smartphone owners. Its simple premise, where birds are catapulted into different structures hiding egg-stealing pigs, brought more than 2m downloads in the first weekend alone."

Source:  The Guardian, 24th November 2010