I have a beige G3 running as a server with Gentoo Linux, I wanted to try NetBSD but the guide said something "this model is notoriously difficult to boot", so I went for Linux.
I also have it on a rev. A G3 iMac, because xubuntu refused to work, but I still haven't installed the graphical environment.

I'd also like to have a Quadra 950 to try A/UX, but that doesn't belong here
_________________
So this is how PowerPC dies... with thunderous applause