We were expecting to see Tango pop up for Windows Phone users this week and, sure enough, here it is. The video calling service finally hit the Marketplace today, more than a year after launching on iOS and Android, and barely a month after expanding to PCs. Compatible with Windows Phone 7.5 or higher, Tango for Mango allows users to make free phone and video calls over 3G, 4G and WiFi connections, including free international calls to fellow Tangonians. Users can also chat with Tango members across other operating systems and platforms, which should help tide them over until that Skype integration becomes a reality. Loquacious legions can download the app now, from the source link below.