Peace esquire...
LTE is live in Philly--but very "spotty" tho. I live in West/SWP area and from what I can see its running from areas close to Upper Darby down to 46-48th streets along B-more, Chester, Kingsessing, and a little upward on those same number streets near and along Walnut, Spruce and maybe a little close to Market. I live near Clark Park on 45th and cant pick up a signal unless I walk up to 46th and B-more (or Chester and/or Kingsessing). But its definitely here and there. If you have a PC go to: sensorly.com and then type in your zip code (make sure you identify "SPRINT" as your carrier and look for "4G" as opposed to WIMAX)