A new version of MiniStumbler, the Pocket PC version of war-driving tool NetStumbler is now available. MiniStumbler is a tool for Windows CE that allows you to detect Wireless Local Area Networks (WLANs) using 802.11b, 802.11a and 802.11g. It has many uses:
Verify that your network is set up the way you intended.
Find locations with poor coverage in your WLAN.
Detect other networks that may be causing interference on your network.
Detect unauthorized "rogue" access points in your workplace.
Help aim directional antennas for long-haul WLAN links.
Use it recreationally for WarDriving.
The author says that some configurations have been extensively tested and are known to work. These are detailed at his site.
This version of MiniStumbler is known to work on HPC2000, PocketPC 3.0, Pocket PC 2002 and Windows Mobile 2003.