Opening a SFO->DCA or DEN->DCA route (one can only wish for SEA->DCA) would be AWESOME! Just don't make the SFO->DCA a red-eye... Now - the only gotcha is whether the east-bound service would be as bad as on the SEA->IAD routes...:-(
If this happens it would be the best news in a while...
Now - who said SEA->LHR???? ;-)