The NYC-DC bus fare wars have a new player: Greyhound division BoltBus will be launching service on March 27 and has started to sell tickets for as low as $1 (plus a 50 cent booking fee). DCist explains BoltBus "operates on the EasyJet principle, where tickets start out dirt cheap and get more expensive as the bus gets fuller. I just purchased a ticket for $7, and if I had been willing to leave on......