The Wall Street Journal is running a short piece today about Angry Birds and it's success for Rovio.
From the article:
"Angry Birds" has generated about 2.35 million paid downloads since its launch in December, Chief Executive Officer Mikael Hed, Niklas's cousin, said in an interview. It costs 99 cents, of which Rovio gets 70% based on its revenue-sharing agreement with Apple, minus what it pays its publisher, ClickGamer.
I can do basic math, and that works out good for Rovio, developers for Angry Birds, who currently employ 17 staff... but from the article are looking to expand for new ports and updating Angry Birds to keep it at the top.