You've come a long way, Big Red. For a network that launched a little over a year ago, VZW's LTE service is about to hit a high water mark, blanketing 203 markets come tomorrow's planned expansion to an additional seven territories. But the nation's top wireless dog isn't taking this milestone as a moment of respite; the carrier's aiming to double its current footprint by end-of-year 2012, boosting its tally to a potential 400-plus areas. As for the grand honor of being the 200th to come under the operat