Listening nodes? Bah. http://nearbuysystems.com http://nearbuysystems.com does it without listening nodes - just an existing wireless infrastructure. Privacy i

Listening nodes? Bah. http://nearbuysystems.com http://nearbuysystems.com does it without listening nodes - just an existing wireless infrastructure. Privacy implications? Indeed. That's why it's implemented as an opt-in guest wifi network. Can't do that with a listening node either.