The problem is that most of the best routes aren't on the DLS. That said, wridenour did a Washington-Baltimore segment of the NEC, although he hadn't finished the scenery in the Washington area. Neuman706 also did a Philly-Wilmington, DE segment. There's Modula City, although I'm not sure if that's a demo of the payware version, an add-on to the TS2010 version, or whatever, but it's an awesome route made by the same folks as Cabon City. My incomplete MainStreet route contains a small tram run as well. I can't think of any others at the moment but if I do, I'll let you know.
