Locus Magazine - The venerable journal of science fiction and fantasy, complete with interviews, reviews and recommended reading lists.

SFF Net by Jim McDonald - Science fiction, fantasy, and horror site, including awards, authors, and agents.

The SF Site (Lots of links and book reviews) - Homepage for Science Fiction & Fantasy. Book reviews, recommendation and news. Excellent Site!

Tor SF & Fantasy - Though a publisher's site, this one is very thorough and goes beyond "selling books". They have nominations for the SF & Fantasy awards listed on their pages as well. Winner of the Locus Award for Best Publisher for the last fourteen years in a row.

Uchronia: Alternate History List - Books of Alternative History, with author/book info.