>>41 SCO OpenServer 5.0.4/i386 to be exact. Circa ~ 1997. This was before they got snapped up by Tarantella(sp?), and of course, later again by Caldera (the company who then picked fights with IBM over leaking Unix source code).

And before you ask -- yes, I have used SCO... it's horrible. :-P

I don't think SCO has gone very far from those days.
http://www.sco.com/products/openserver6/

That page suggests, yes, they have moved forward somewhat... they've gone from supporting 4 CPUs, up to 32. Wow... Linux runs on 128 and above just fine -- first did so on an Origin 2000 system back in early 2001. There are other improvements, such as hotplug SCSI, which have existed in Linux and BSD -- even Windows, for years. This version also apparently adds AGP support -- something Windows has had since Win98, and has been in Linux almost as long.

SCO OpenServer 6 was released this year.

I guess they call their software distribution CD, Skunkware for good reason then... ;-)
http://www.longlandclan.hopto.org/~stuartl/atomic/skunkware.png