This article in one of the BusinessWeek blogs addresses bandwidth for WiMAX (which has also been reported elsewhere). The idea is to auction spectrum being vacated by analog television after the switch to digital takes place in 2009 for WiMAX.
Why not auction the spectrum in an application blind way? In other words, is it important to specify that this spectrum should only be used for WiMAX? Why not let the auction winners decide what to use it for?