Aubie... you got a very good deal with the Grey Line Shuttle from EWR to the World Trade Center. By taxi, including tolls and this and that... a ride between those two places can run as much as 30-35 dollars. ANd probably nicer service.

If you did not have much luggage, you could have taken the AirLink shuttle from EWR to Newark Penn Station, connecting to either the Path train to WTC (one dollar) or to midtown
by Path (one dollar) or NJ transit (about 3.50.)

I will e-mail you the number for the Taxi and Limousine Commission shortly and post it here
once I get this "important" letter from work.
CATMAN