There's a LOT of locals (loosely defined) springing up lately. Most are mediocre to decent. But I'd say Port City really shines with just all around good solid beer, especially with their seasonals. To my knowledge, they still don't distribute outside of VA, DC, and MD.
Mad Fox does some EXCELLENT renditions of English styles, although they're more famous for other things, and their distribution is minimal at best, mostly VA brewpub and DC bars only.
My best, I'd say is Oliver's in Baltimore. I haven't had a chance to try many (only at a few bars around here), but they've all been excellent. Of course, I love the English ales, and Oliver's does English ales brewed right, brewed by an Englishman, and they're fantastic.