[msephton]

This reminds me of something I wrote in early 2000. At that time RSS was less than a year old and if I'm honest I wasn't aware of it at all. I wrote a short PHP script to get the HTML of each site in a list, do a diff against the most recent snapshot, and generate a web page with a table containing all the changes. I could set per site thresholds for change value to cope with small dynamic content like dates and exclude certain latger sections of content via regexp. I probably still have the code in my backups from the dot com boom job I had at the time.