Too bad commuter trains no longer go down the Delmarva Peninsula. I'm originally from Salisbury and that would be a fun ride, as opposed to the stinky Greyhound/Trailways, but I doubt many people would use it. You'd think DelDot would at least run rush hour trains to Dover, though, to ease commuter traffic on the roads (while not getting stuck IN the traffic as buses do).
In terms of distance, going down Delmarva is a much more direct way to get from Wilmington to Virginia Beach/Norfolk, and by car, it avoids the horrible mess around D.C. But there's not nearly enough demand for a train that way. (I wonder if the Chinatown buses to Norfolk go that way? I tried to ask them once, but they didn't speak enough English to give me an answer.)
As I understand it, there used to be a train ferry from Cape Charles across to Virginia Beach/Norfolk, but that was probably about 50 years ago. And maybe that was always just for freight, not passengers (?).