EDIT: CozumelJen already answered the question.
I thought that the fee was $5 to access the monorail system if you don't have a ticket, but I could be wrong. For my money, the $11.45 that I pay for the AirTrain is such a good deal compared to the $45 that a cab costs me to get to EWR/JFK or the $25 to LGA that I'm not complaining.
[This message has been edited by aparsuites (edited 04-02-2002).]