[BruceIV]

I name all my computers after Tolkien characters, I have a friend who names all of his after breakfast foods, my alma mater named their servers after Norse gods, all the computers where my wife worked were named after sci-fi starships. If you can't find a theme you all like, naming them something boring like `file` `print` `db`, etc. would probably work too.

[BruceIV]

If you're looking for something a little less nerdy than some of those suggestions, why not names of streets or neighbourhoods in your city? The main key is that you want a theme with some headroom (you don't want to run out of names at five or six), and you want names that are fairly short and aren't easily misspelled.