A small company that makes replica props from television and movies.
A jeweler who manufactures pieces inspired by (modern) fantasy, such as the Dresden Files and the Lord of the Rings.
E.N. mercilessly spoofs gamers, science fiction, video games, cyborgs, cliches, magical girls, sex, and mad scientists. It's an adult comic, so I'd advise that you keep your kids away from it, but it's also screamingly funny.
The companion book to the Doctor Strange comics, by Cat and Nagasiva Yronwode.
A community-built and maintained database of science fiction, fantasy, and horror that includes bibliographic data, community reviews, ISBN numbers of as many editions as people can find (of use to amateur librarians such as myself), and links to anthologies.
The unofficial wiki for White Wolf Publishing's Old World of Darkness. Here you'll find information about the games, metaplot, and constituent groups.
A wiki of different host naming schemes, all geek related. You could get lost in here for a while.