109
Xfinity using WiFi signals in your house to detect motion
(www.xfinity.com)
I remember when MIT had a paper on this around 2000
Mad at the concept, but at least it's off by default. Had Xfinity for 2 years and was running my own modem and router anyway, so I'm all set if I decide to switch back at this point
This is a most excellent place for technology news and articles.