Yes! There is a photo of the NeXT cube hosting the SLAC website at the bottom right of this page:

https://www6.slac.stanford.edu/news/2014-10-29-earliest-webs...

And on that cube is a yellow post-it note: "PLEASE DO NOT TURN COMPUTER OFF":

https://www6.slac.stanford.edu/sites/www6.slac.stanford.edu/...

Shades of the original server of Tim Berners-Lee:

http://commons.wikimedia.org/wiki/File:First_Web_Server.jpg

Direct link: https://wayback.stanford.edu/19911206000000/http://slacvm.sl...

If you view source, it's utterly depressing that literally 98% of the page's code is dedicated to rendering Stanford's fancy overlay. The actual site, OTOH, is 8 lines. Wish we could have stayed with that simplicity and elegance.