It's a very good time to be a wine drinker in D.C. With spring not too far away, wine bars have been popping up like daisies around town. Newcomers include Proof in Chinatown, Vinoteca at 11th/U, and Veritas in Dupont Circle. Just last night, another contender entered the fray: Cork officially opened its doors on 14th between R and S. The wine list is 40 strong by the glass, and around 130 by the......