I am doing the trip from Pittsburgh to DC in July. Really looking forward to it. I rode a few of of your PA trails this past week. Lehigh Gorge (thanks Little Darwin for the recommendation) which was great. Pine Creek trail (I believe it was called) is another great ride I did last week.
I am ready to go though for the Pittsburgh to DC thing. Rooms are reserved. One way car rentals done. I just need for July to get here!