[Black Cardinal]

I'm in a similar boat as you, I have a 9000/735 and a C8000 tower.  I got the 735 out of nostalgia for my graduate school days where I cut my Unix teeth on 715 and 712 workstations, and I was familiar with the C8000 from work so snapped one up years ago on an Ebay deal.  But aside from installing HP-UX and getting the core system running, I have no useful software for them and never figured out a good use for them.  So they just sit in my shop attic collecting dust.  They are built like tanks and I always liked HP-UX running with HP VUE (or later) CDE so it seems like a shame.

That's one reason I like my SGIs so much; there is a lot of useful software and games around for them.