Yeah, I use netstumbler at work also. Awesome software. I bought the Kensington thing more out of curiosity than anything. It does come in handy when at airports, conferences, or hotels to be able to quickly check if a open WiFi network is running. I played with it enough to think about the broadcast SSID thing though. That is good to know.
To answer the earlier question, yes, most USB memory sticks are pretty much the same. Some older systems complain a bit if you plug a new stick in to a non USB2.0 port. A personal recomendataion just off shear OMFG factor would be the following...http://www.thinkgeek.com/gadgets/electronic/6a29/