I have tried network stumbler but can't get it to work?
Thanks
Try right click on netstumbler and select run as administrator.
http://gallery.live.com/liveItemDetail.aspx?li=b6411e2e-e372-430d-a534-c4c5fc8a5097&bt=1&pl=1
Xirrus Wi-Fi Monitor.
Doesn't look that great but when you open it up it's a lot better.
M.
Try Vistumbler from here http://www.techidiots.net/project-pages/vistumbler .