Sprint and Clearwire's WiMAX service has been making occasional cameos throughout the five boroughs since at least June, but now it's official: the service has been launched, closing up one of the most conspicuous holes in coverage so far. This matches up nicely with the San Francisco go-live we reported on earlier today, so you'll now be able to take your red eye from the Big Apple to the City by the Bay without fear that your EVO's going to get slow when you go wheels-down. Plans run from $25 a month (for the iSpot