Hard to believe it’s been a year since Windows Phone 7 was launched in the US. Microsoft’s partners certainly haven’t been releasing new devices at an Android-like pace, but there are several new devices launching with Mango on both AT&T and T-Mobile. In addition to all of the new features that Mango brings to existing hardware there are some additional upgrades you will only notice if using one of these newly launched devices. One of the most welcome upgrades is support for front-facing cameras. We have to admit that we are rather surprised that the first video-calling app for Windows Phone isn’t Skype, but Tango for Windows Phone definitely brings some attractive functionality to the platform.