Delta typically rotates the BusinessElite wine selections each month, and so far as I know the list is not route-specific. I'm not sure if they keep the page up to date, but
Delta.com lists the following options:
Whites
St. Supery Sauvignon Blanc, Napa, California, 2009
Gouguenheim Torrontes, Mendoza, Argentina, 2009/10
Reds
Cousino-Macul, Antiguas Reservas Cabernet Sauvignon, Maipo Valley, Chile, 2008
Albert Bichot Mercurey, Burgundy, 2009
Champagne
Champagne Jacquart Brut Mosaique, France, NV
Dessert Wine/Port
Pacific Rim Riesling, Washington, 2007
Ferreira Dona Antonia Reserve Porto, Portugal, NV