I found a site survey mode in my BB 8320 that works somewhat similar
to netstumber. I sniffed this site from Mission Peak, about 20 miles
away.
=======
SSID: Black Mountain Link 2
Mac Address: 00:02:2D:64:B4:79
Encryption: WEP
Channel: 1
Signal Strength:-87 dbm
Band: 802.11b/g
================
Mount Allison site was about 8 miles away.
----------------------------
SSID: Allison North SJ Link 2
Mac Address: 00:02:2D:29:E9:87
Encryption: WEP
Channel: 1
Signal Strength:-89 dbm
Band: 802.11b/g
--------------------------------------
I assume these are point to point systems with very directional
antennas, and not necessarily related.
The BB 8320 also has a tone beeper mode that changes the repetition
rate of the tone relative to the signal strength, to aid in finding
the transmitter.