I have never heard of this! I have always used XFree86 (later forked to Xorg) as far back as I can remember. From what I can find, this was a commercial/closed source server that shipped for $99. There doesn't seem to be much info it.
http://ictbanking.com/LJ/035/1374.html
Actually Metro-X server sounds quite cool for its time. Multi-display support, X-based GUI for configuration (anyone remember xf86config stuff?)...
I actually bought the Red Hat Linux 3.0.3 (and used it and its successors Until Red Hat 7) but the Metro-X didn't support my video card so I was stuck with the XFree86.
Does anyone know if the later Redhat versions (than 3.0.3) offered Metro-X? Probably not in the free, downloadable ISOs but was it bundled in the sold CDs or was this one time thing only?
Wow, yeah. I also remember the YaST X configuration tool that shipped with SuSE.