During a meeting with Microsoft VP Joe Belfiore, AllThingsD was able to confirm that Rovio’s smash hit Angry Birds game will be available for Windows Phone 7 devices beginning on May 25th. That will leave BlackBerry OS as the last modern operating system to lack support for the title. Belfiore didn’t comment on how much the game would cost, but we hope it’s in the free to $0.99 range. Rovio has launched a number of seasonal updates to Angry Birds and most recently published Angry Birds Rio. It remains unclear which version will hit the Windows Marketplace.