Kismet works, and isn't too tough to install. I did it, but I don't remember exactly what I did, and I'm not much for change control, so I don't have documentation.

You'll have to have xterm & root access. You should be able to search this board & figure that out.

Kismet is packaged & has minimal dependencies (libpcap, perhaps more.)

The site:

http://www.gronmayer.com/n800/repos/index.php?lang=en

is the place to start for finding applications.