Great comparison video - was really ready to purchase IPEVO's document camera - soooooo glad I decided to watch this one though. You don't have to ask which one I going to get!
you can get usb wi-fi dongle for cheap, so that you can have 2 wi-fi for your computer. one can connect to the internet, and the other to the wi-fi cam, at the same time.
And what's with the micro-zooming when the focus changes? That's the biggest focus breathing I've ever seen, it borders on headache inducing -- and it's so common, they couldn't keep it out of the advertisement video. I'm no teacher, but legal videographers can't really afford one of these either.