Garrett Murray writes about his history with naming schemes for hardware and networks.
My favourite scheme so far was in one of my former offices, where we named everything after Street Fighter characters. A few of the notable names:
Another benefit of the scheme was that, given the proliferation of Street Fighter sequels, it was unlikely we were going to run out of names very quickly. The scheme I use at home is characters from Azumanga Daioh. My iMac is Chiyo, and a rarely leave home without Tadakichi-san, my MacBook.