Namenerds.com certainly has a dauntingly long list of nerd names. Their particular definition of nerd name seems to be even narrower than "names of sci-fi TV show and movie characters," though. Their "name your baby nerd" list, largely culled from the Star Treks, the Star Wars's, and Dr. Who, is all pop SF. Rather than an obscure character in a mass market movie, I'd think a hard core nerd might prefer to name his kid after a major character in a deeply esoteric, connoiseurs-only sci-fi title.
Anyway, Name Nerds' List of The Week feature takes an entirely different approach, providing unusual categories of names:
Top names from Harvard's Class of 2005
Characters played by Julia Roberts and Tom Hanks
Titanic steerage passengers, &c.
What to name your baby nerd [namenerds.com, look under "other lists"]