Filed under: WirelessWhen you're the co-founder of Microsoft there's always that nagging question of what to do with your millions billions. How 'bout bidding for some of that hot 700MHz action in the sweetspot of US spectrum? Seems that Paul Allen has filed to bid in the FCC auction with an entity called Vulcan Spectrum LLC -- an investment company. Hint: Allen is also the majority shareholder of cable operator Charter Communications. Other notables on the list include Google and Verizon Wireless, naturally, as well as Qua