A report from Pocket-lint's cites an interview with Peter Vesterbacka, the self-styled "Mighty Eagle" at Angy Birds creator Rovio. In the interview, Vesterbacka confirms that the company is working on a Windows Phone 7 version of the game, but that Microsoft has been holding up the release. "Let's just say Microsoft has a lot of lawyers," Vesterbacka says in the interview.
Vesterbacka also confirmed in the interview that a 3D version of the game is forthcoming. However, he offered no further details.
The introduction of a Windows Phone version of Angry Birds comes after Rovio launched the game for the Android platform last October. The game, however, is best known for its iPhone iteration. In December, Rovio CEO Mikael Hed said that Angry Birds has been downloaded more than 42 million times and 25% of those downloads were paid. He also said the company makes $1 million a month in advertising alone.