Oh, man; I got my hands on a (dead) one of these when I was a freshman in college (2004) and instead of trying to restore it my friends and I gutted it and used it as an original Xbox case mod. It was pretty satisfying to show up at LAN parties with what looked like a Solaris box and watch people boggle when we played Halo on it...
I've been wanting to get one for a PC mITX case mod. I love Sun's design language and the IPX cases are cute.
I have got a Sun Type 5 keyboard though. I brought it to a mechanical keyboard meetup once, only to show it off because it is so pretty. Not the best key feel though, but I've got nothing to use it with.