(Via Ars Technica)
I've seen the idea that your cell phone could be eavesdropping on you in novels and around the Internet, but I've been a bit skeptical. We now have confirmation that this is a real capability.
Nextel, Samsung and Motorola Razrs are all vulnerable to this.
New rule--if you have a cell phone and you want to have a truly private conversation, be sure to pull the battery first.