Companies place trackers on your computer and sell you web search activity.

Ever wonder how after you search for a product or look up some information you suddenly get e-mail from other sites on the product? Well, this is how it’s done.

This is for real. Reported by a team from the Wall Street Journal.

You need to listen to this story…. Please copy and paste the following in your address bar to get to this radio story. It is definitely worth it.:

http://npr.vo.llnwd.net/kip0/_pxn=0+_pxK=17273/anon.npr-mp3/npr/fa/2010/08/20100819_fa_01.mp3?dl=1

So Many Trackers, So Little Time (voices.allthingsd.com)
What online marketers know about you (flowingdata.com)