The Boston T is in the process of upgrading all of its fare equipment. They are getting rid of tokens, and will require everyone to use the new CharlieTicket which is a plastic card that has a stored value that you put on it, or a monthly pass. It looks like most of the Blue line has been converted to the new system.

http://www.mbta.com/projects_underwa...d_stations.asp

but many stations on other lines are not converted, so if you use other stations you'll have to pay the $1.25 fare separately.

It's not a big deal, but I just wanted to make you aware.

http://www.mbta.com