One area which Microsoft has been continuously updating with new content is the personalization gallery for Windows 7. We have already seen the awesome Best of Bing themes which brings in wallpapers featured on Bing home page. Best of Bing brings in stunning animal shots, awesome landscapes and other eye-catching Bing images. The latest one to this series is the Best of Bing 4 theme for Windows 7. The theme features 18 high resolution wallpapers.