Here at university, i can't do my own DNS, so they all have lame names as mech046, mech101 etc
In the early university days, workstations had names of small moons/planets, like Mimas, Pluto, Dione, Rhea and the big fileservers had names like Titan and Atlas. A fitting combination IMO.
SGI holland uses a rather convoluted naming scheme: first the decide if the machine is used for presales, support or demonstration, and then name the machine after a dutch city, which the first letter a P for Presales, an S for support etc. So they had in their demo room 8 O2's with names like Delft, DenHaag, Diemen etc...