Attached Link: http://www.netmind.com

If I remember correctly there is a service online that will track whether or not a web page has changed... the link to it was http://www.netmind.com I remember because back when I first started doing web pages, I gave viewers the option of being notifed by mail when the page changed. I just tried going to that address and it appears to be down however the service still comes up in web searches. Very odd!