Rumors of a Zune phone could very well be proved true a few years down the road, what with the hints dropped by Microsoft when the company submitted a filing to the FCC just this week. This file touched on a wireless device which could be used to talk via the Internet, courtesy of OFDM technology which can be used to route digital TV and voice calls among different devices. Imagine making calls on a WiFi/WiMax network with the Zune phone - the market is still in its infancy at this point of time, but according to the Zune roadmap that features a revamp every three years, 2008 is a good year as all the necessary pieces on the chessboard will probably be in a favorable position.