Avweb's flight tracker http://www.avweb.com/fe/
is only 9.95 / month, and is very slick. I subscribed to it for awhile a couple of years ago.
Even more fun IMO, is to "roll your own" display. You can either use a simple paint program, or maybe a free 3d program like Blender, and get as elaborate as your time and energy allow
I've started to do just that, playing with FlashMX.
There are also some ATC sim's on the web as well that you might be able to customize.