Like the person who thinks socks with sandals is a bold fashion statement, WiMAX is a mobile technology that rarely gets invited to the cool parties anymore. NetZero, realizing that its WiMAX-powered mobile broadband needs to move with the times, signed a deal to use Sprint's 3G, and latterly 4G, to bolster -- and eventually replace -- the service. Stage one of that agreement has now gone live, enabling NetZero users to hop onto Big Yellow's EV-DO, which is more robust than Clearwire's equivalent. The only disappointment, it seems, is that you'll now have to wait until the fall before 4G services come online.