Just when you thought it was safe to have an e-mail discussion list, Mr. Bezos patented the technology while you weren't looking. See the link below. (Warning: The link may wrap. If so, you'll have to cut-and-paste it into your browser.)

Rick Smith, "The Net Guerrilla"

http://eletters1.ziffdavis.com/cgi-bin10/flo/y/eUFA0Ey1Xh0FbM0u470A6