The big day is finally here! As Eric noted this morning, we’re officially rolling out Windows Phone 7.5 (which many of you know better as Mango) worldwide through our mobile operator partners. While many of 7.5’s killer new features like Bing Vision, Threads, Groups and the new IE9 have been on display for a while, there are a few secrets we’ve kept under wraps. Today I’ll walk you through them.





