They're pretty easy to pick up these days if you care to try! I still have mine and it works perfectly, and it runs two 366As at 550MHz (common combo it seems!) with 512MiB.Tragically I've never even seen one AFAIK. Somebody I know must have had one but I just don't remember checking one out.
I moved from that to the VP6 (Via dual-socket S370) with P3 733s @ 1GHz+, 1GiB and RAID0 40GB Deskstars (they never failed!). Original Radeon too, which was simply horrible under Win2K, but I still loved it.
Man, those were the days, seriously good times to be had on the net with the community back then. Anandtech was just getting started......I fire them up from time to time for the nostalgia kick, and they run Debian now.