Great features coming to Windows Phone 7 as of the upcoming Mango update -- some of them announced by Steve Ballmer at this year's MWC -- Redmond appears to be having a couple of more aces up its sleeves as Windows Phone Dev Podcast has published several images which might point to possible future features the Mango update will bring to Windows Phones. List of Features: Bing Audio appears to be a music recognition service or feature where, similar to third parties, you'd hold up your Windows...