That's funny. I called Amtrak last night to inquire about that very route and found that no airline bennies apply. You can get a 10 trip pass (to be used within 45 days) for $565 or a $1271 "Smart Pass" (unlimited monthly riding). I thought about asking if they'd be interesed in signing up for CAASS.
Click on the link, scroll down and click on Northeast Corridor 1. Tons of departures to and from your locations.
http://www.amtrak.com/servlet/ContentServer?pagename=Amtrak/Page/Schedules_Index_Page&c=Page&cid=1080072922206&ssid =3[/URL]