The photo that shows up for a DAL B764 flight is actually a B763. I looked for Delta B764’s in the database and did see one current-livery DAL B764 with 5 star votes (N828MH), and another one in the Delta/SkyTeam livery that can be used. The flight I checked was the trans-Atlantic portion of DAL3.
Best wishes to everyone at FA for a great 2010