Not sure about free sniffers -- you can try AirScanner's for 30 days, but it's not free. http://airscanner.com/downloads/sniffer/sniffer.html

Same with vxSniffer -- 30 day trial http://www.cam.com/vxsniffer.html

Neither of them worked

ooh, thanks

Heh. Nice. I have a Cingular 8125 (HTC Wizard) w/ WiFiFoFum and a Rikaline 32-channel GPS tuner. It works OK, but doesn't do passive mode. Any tips on where to get a freeware sniffer?

I'm getting my license in september, and I can't wait. I'll also have a kenwood th-d7ag with a nifty APRS setup.