Michael Kassner has some interesting reading here about some new smartphone (iPhone, Windows Phone, Android) apps that actually listen in on you. http://www.techrepublic.com/blog/security/smartphone-apps-they-may-be-listening/5378?tag=nl.e101
He also links to Leo Laporte’s video blog about one such app at http://twit.tv/295
Interesting stuff, and definitely something to keep in mind if you need to deal with compliance issues in your workplace.