I have an inexpensive Atheros 5x00 802.11 a/b/g PCMCIA card hooked up and good ol' netsumbler installed. I even have a USB GPS going so I can do logging. Its an O.K. setup, but the DT will choke out and stutter a bit when I have 80+ APs being tracked at once. Aruba Networks' Blue Scanner helps me look for bluetooth, and I have some apps used for decoding data off of a radio scanner.
Slow Scan TV is a way of encoding digital images and transmitting them over an RF carrier, commonly on ham radio. You can use FRS or GMRS as well if you arent a ham, but the range wont be as far, of course. The WebDT does a damn good job at this, and makes a great durable handheld device for the task. Its durability makes it very good for aggressive field use. Battery life could be better, but I think we all have that issue.
![Image](http://lh5.ggpht.com/_i7ymkA4U878/StKTtzkP_DI/AAAAAAAADrQ/pwRHEQTpV3U/s720/IMG_2033.jpg)
I posted download links of the software I use int he Windows thread of the forums: forum/viewtopic.php?t=5
I also have a WiSpy 2.4Ghz Spectrum Analyzer but it doesnt run all too great under linux or XP: