I'll throw out my opinion, since I live in the DC Area (northern VA to be specific) is that the greater mid-atlantic region gets split out from SE and NE. I'm not too sure (living here for the second time) that folks who live in the DC metro area consider themselves part of either area--NE or SE. I realize it is challenging, because even within a particular state there may be identification with more than one of the common regions, however, as the current regional structure for the forums is organized, the DC area, which includes a sizable portion of northern VA and MD is split.
I propose a mid-Atlantic sub forum consisting of NJ, PA, MD, DE, DC, VA, WV. Thoughts?