Sensor: ALFA AWUS051NH
GPS: BU-353
Software: Backtrack 5.

Usually I hang the sensor and GPS from the rear view mirror. The GPS is magnetic, but on the dash its constantly sliding off.

I usually don't find much on highways. Even with high gain antennas its just a matter of distance and other people have already found the hosts. I usually look for places in the direction I'm driving where I can get off the highway for a few miles and then get back on. If I see a set of buildings ...