On a side note, but within the topic, I have a friend who is a professor of physics at my old Uni. He was talking the other day about wireless networks in his home and office. He advised me that if you have a wireless network, to never position your body between the computer your using and the transceiver for your network.
He is a clever man, so I do take his advice. He believes that it could be potentially dangerous to have these transmissions pass through your body.