AT&T has announced LTE network expansion into Philadelphia and Wilmington, Delaware today. AT&T's has a lot of plans for LTE expansions before the end of the year, though that's only as appealing as the devices they're offering. The last LTE phone AT&T announced was the LG Escape, which targeted first-timers, though there are always faithfully established options like the HTC One X and the Samsung Galaxy S 3. AT&T also has a handful of new shared data plans, though you might want a bucket to yourself if everyone's going to be blasting through their cap at LTE speeds.
Want to know if you've got access to AT&T LTE? They've got a full coverage map over here. Anyone in the new coverage zone happy to get sweet, sweet, LTE?