Last year we reviewed the original Mogo Talk Bluetooth headset and case combo for the iPhone 3 and 3GS, and now there's a MoGo for the iPhone 4. The MoGo Talk XD combines a slim headset and an attractive case-- it's perfect for those of you who tend to misplace the fiddly bits like headsets. The case can charge the headset whenever you plug in your iPhone to USB or AC power too. How's call quality? Read our review to find out.