sco.gaertner.de, my own SGI box. I have not much space in my flat at home, so I rather have it running in Alcatraz and connect to it remotely.
We have a few clients with (much more modern) SGI workstations. But none of them have a compiler license, so it is very handy to be able to compile important software for them on sco, such as sendmail or BIND.
It's a lowly R3000 based Indigo, but it feels quite slick to me. On top of it a CDROM drive using those old caddys - it has gotten quite difficult to find a place which still sells CD caddys, BTW.
I think its IRIX 5.3 is the most SysVish system we have around here.