With the availability Angry Birds game for Windows Phone 7 Microsoft released “Angry Birds Theme” for Windows 7 users which is available for download from Windows Personalization gallery.
Official Angry Birds Theme from Microsoft for Windows 7
Birds are angry as their eggs have being stolen by Pigs, they have no wings Microsoft wants you to contemplate their mood at length with their Angry Birds theme. This theme pack contains 5 wallpapers.
