Not quite gone yet. Found this (much to my surprise) while packing:

While I've met a handful of astronauts at Safety Days and the like, I can't remember making note of a meeting like this for any of the others. I had forgotten about this meeting, in fact, though I vaguely remember being in the middle of something and getting unexpectedly interrupted by a group of astronauts, one of whom shook my hand and gave me these pins. What a coincidence.