I don't know if someone tried this, but I just checked the Wayback Machine website archive for his site.
It looks like it was being archived for years... until June of 2003. To keep a site from being archived you have to deliberately insert a bot program to make the webcrawler skip over it and not document the site contents.... interesting that he wouldn't want his site recorded.
http://web.archive.org/web/*/www.johnkerry.com
Scratch that, maybe... georgewbush.com also stopped recording at the same time almost to the day so maybe it was a change in their policy regarding political sites?