All other carriers are going to suck wind. This network will make 4G the horse and buggy in comparison to Sprint rolling in on a Corvette. As for the IPhone.... something even better yet is on the work-bench. By 2013, you will look at this measly stock price and kick yourself royal for not have had accumulated every available share.
Clearwire is the carrier going with LTE-Advanced, which on 40 mhz channels (note the word "channels" is plural as they have so much spectrum that they can actually do that) will run at about 10 times the speed that Sprint's "me-too" solution will run at.
Sprint is going with "vanilla" LTE because Dan Hesse has contracted a brain disease and his intellectual ability has been reduced to that of a lunatic.