These lists all pool information about what's already been published.

The SF Site: The Best in Science Fiction and Fantasy

"SF Site is composed of many pieces. Twice a month since July 1997, we have posted a mixture of book reviews, opinion pieces, author interviews, fiction excerpts, author and publisher reading lists and a variety of other features. At the same time, we've maintained a comprehensive list of links to author and fan tribute sites, SF conventions, SF TV and movies, magazines and e-zines, writer resources, publishers and small press sites and many other SF resources."

SFReader.com

SFReader.com wants to be one of the Internet's top resources for reviews and information on and about speculative fiction novels, anthologies, and authors.

On SFReader.com, you'll find reviews of speculative fiction books and anthologies, reviews written by readers just like you. Furthermore, you'll find this in a fully searchable site. I want it to be easy for you to find the title or author you're looking for, and I want it to be equally easy for you to browse through a variety of titles at your leisure if you're not looking for something specific.

Additional content will include author interviews, biographies, articles, and short fiction.

The Internet Speculative Fiction Database

"The ISFDB is a community effort to catalog works of fiction. It links together various types of bibliographic data: author bibliographies, publication bibliographies, award listings, magazine content listings, anthology and collection content listings, and forthcoming books."

The Locus Index to Science Fiction

Locus' no frills but comprehensive index.

The Locus Index to Science Fiction and Fantasy Awards

"This Awards Index compiles results of awards given in the fields of Science Fiction, Fantasy, and Horror. These are awards primarily concerned with books, writers, and publishing (rather than film and television, in case you came to this site looking for something else - though a few awards compiled here do focus on the dramatic media), and the awards compiled here range from professional honors analogous to the Oscar or Emmy awards, to reader polls, academic prizes, and awards made by the community of "fans" who are devoted to the literary SF genre."

Science Fiction and Fantasy Research Database

"The Science Fiction and Fantasy Research Database is an on-line, searchable compilation and extension of Science Fiction and Fantasy Reference Index 1878-1985, Science Fiction and Fantasy Reference Index 1985-1991, and Science Fiction and Fantasy Reference Index 1992-1995, including material located since publication of the last printed volume. Most material was obtained and examined by the compiler; the remainder was verified in a reliable secondary source."

VISCO: The Visual Index of Science Fiction Cover Art

"You may think that the objective of the Visco project just a tiny bit ambitious.. Its ultimate aim is no less than to collect and make available over the Internet a cover image of every science fiction, fantasy, weird and horror magazine ever published in the English language." Here's an explorer based off of this index.

Science Fiction Citations

"Hunting for the earliest versions of SF words.

Welcome to the new version of the Oxford English Dictionary's science fiction words site. The base project was originally set up so that knowledgeable aficionados could help the OED find useful examples of words in their fields of interest. This first project, and still the only public one, is devoted to science fiction."

Adherents.com - Religions in Literature

"This list contains 34,420 citations from literature (primarily science fiction and fantasy novels and stories) referring to actual churches, religions and tribes. This list is intended for literary research only. This is not a source of information about religion."

Bibliography of Mormon Speculative Fiction

"This bibliography contains works published by or about LDS authors, including novels, short stories, poetry, and theses/dissertations, articles, and interviews."

Scientists Who Write Science Fiction

"This is a compilation of scientists who are also science fiction/fantasy authors."

Feminist Science Fiction and Fantasy: Resources for the Serious Fan

"Produced, and maintained by Trudy Mercer."

Feminist Science Fiction, Fantasy & Utopia

Another compiliation of feminist resources by Laura Quilter.