Sun Fire v100
Overview
I don't have much to say about this machine, since its just a server with no frame-buffer. I had dreams of running Solaris and Apache on this machine and hosting this website on it, but I don't think its worth the effort or the electricity.
This was the very first Sun computer I acquired, and the first time I experimented with Solaris.
I believe it has a ~600 MHz UltraSPARC IIe with 256 or 512MB of RAM, 80GB IDE hard disk, running Solaris 10.