From Bains Software:
SnapperHead is a handy little app that sends screenshots to people who enter your IP address into a Web browser. Simply launch SnapperHead, then send a friend your IP address (it is shown on the SnapperHead window under Snaps Served). When they type that Internet address into the location field of a Web browser (you know, where you usually type in http://www.stimpsoft.com), they will be sent, as an image in their browser, a picture of your screen. That's all there is to it. This version is the first release on CNET Download.com.