I just ran a link checker for one of the websites I’m running, and got the first ever http error code 410: Gone that I’ve seen, for something that was a Geocities page. This seems to be in the correct spirit of 410 as embodied by Mark’s blog post on it.
For those that have no idea what I’m talking about, don’t worry, it’s geekery about the specifics of how the web works under the covers.