Jason Powell (author of Church IT and other musings blog) has written a nice blog about his first impressions of Wi-Spy.

So I’m already finding the Wi-Spy useful just for my simple home setup and I’m very curious to see what it will reveal at GCC. If you have to deal with wireless setups you should probably go get yourself a Wi-Spy now excuse me, I’ve got to go decontaminate from operating our microwave.