do you know if they can add any more airports to there list? does anyone know where i can email them?
There's a nice little 'Contact Us' link at the top of Passur's main page'. Try that.
As for them adding more, It's mainly up to the airport authority of the particular airport, and Passur. They would have to purchase the monitoring service/software from them, and get it going before Passur can do anything about listing more. For that, you'll need to ask the airport you want it at.
BL.