Spider's Home Page! Presented by Ted Powell, with comments by the author, pictures and more. This would seem to be the "official" home page. :-)
A Little Humour A very nice list of other Callahan's links. Excellent links for a number of things - Rocky Horror Picture Show, All Things British (which includes Red Dwarf and Doug Adams), Horror, and so on.
Callahan's Crosstime Links A very nice Callahan's page. Also check out her home page, the graphics are gorgeous and it's interesting throughout.