Originally Posted by Jayhem
Other good ones to write home about would be Dominion Oak Barrel Stout
Dominion is brewed in Deleware, not Virginia and ABInBev has a significant minority ownership and exclusive distribution.
As far as "package" breweries, Northern virginia only has Port City and Lost Rhino. Lost Rhino is currently bomber only and very limited distribution leaving Port City as your only real option unless you're visiting the actual breweries. (This is excluding brewpubs) The Port City Optimal Wit is a very decent wheat beer. I really like a lot of Lost Rhino, but it's hard to get outside of going to the actual brewery.
Only other Virginia brewery I can think of that hasn't been mentioned yet is St. Georges. Of all of them, Williamsburg Alewerks might be the most impressive.