I'm testing WirelessMon Professional (from Passmark) as my new go-to network stumbler...
It has a nice user interface, graphical strength meter and the ability to connect to WiFi networks...
Setup as an external app in the CF options, it integrates nicely.
And the best part (of the Pro version) is it supports GPS logging, and exporting into MapPoint...



GPS setup screen...



You can also import a map image file, set (or map) the GPS co-ordinates, and run it as a strength meter, plotting on the map the strongest and weakest areas for any particular AP...

Seeing as my APOI plugin seemingly doesn't support MapPoint or iGuidance file format (the two most popular GPS add-on's for CF!!), I'll be using this instead...