Amtrak 'Multi-Ride' 2011 Costs - Amtrak Commuter Pass / Monthly Pass for the Philly-NYC Commuter.
From the Amtrak site:
"Multi-Ride Tickets, which allow you to ride multiple times within a set amount of time, are available in monthly, ten-ride, six-ride and two-ride options. Multi-Ride Tickets are not accepted on all routes. Read the Multi-Ride Tickets terms and conditions for travel, reservation and ticket requirements."
These prices I got today from the amtrak.com site and are between stations PHL and NYP
$1,242.00 One Monthly Ticket
The monthly ticket is valid for unlimited travel for an entire calendar month.
$552.00 One Ten-Ride Ticket
The ten-ride ticket is valid for ten rides within a 45-day period.
Click here for more info on the Amtrak website about Multi-Ride tickets in general.