I work at the University of Utah. They had an incredible graphics symposium a few years ago[0]. I got a render of the teapot signed by several of the speakers, which is a prized possession. There was another guy there with an actual replica teapot which he got signed. I was pretty jealous.

Sadly Alan Kay was unable to attend so I didn't get to meet him.

[0]: https://www.youtube.com/watch?v=ui3R1Dlmsk0