I named my first iPod Horatio. I had been studying Shakespeare in school when I got it, so it fit well enough. When I finally upgraded from a 4GB Nano to a 120GB Classic, I just named the new one Horatio the Second, or Horatio II, or Horatio 2.0. It depends on the mood I'm in.
My USB flash drive is named Horace. Again with the Shakespeare thing.
When I first got my PS3, I was chatting with my girlfriend as I hooked it up. I was flipping through the settings and what-not, and saw that you could actually designate a name for it (yes, there is a place you can do this). I laughed and told her about it, and she told me that I should name it. In fact, she told me that I should, and I quote, "name it something sleek and sexy, because that is a perfect way to describe a PS3". So I named it Sylvia.
My girlfriend had a lot of fun with that, let me tell you.