Just when you thought you were secure, someone comes up with a new way to watch you from afar. I came across this article on CNN.com today. While this isn't really new to me, it might be to you. Here is a snippet from the article:

Keyboards are silent transmitters

Your wireless internet connection is secure, you have anti-virus software, and your firewall is up.  You think you are safe from identity theft but there is a new way to gather information from your computer.  An internet connection is not even needed.

This time the culprit is your keyboard.  With each keystroke a slight electromagnetic wave is emitted.  A simple wire cable or a small antenna can pick up these waves. With the right computer software keystrokes are deciphered.   These waves can even travel through walls.

Click here for the full article.