Links

http://www.abebooks.com/ (finest site for used books)
www.firstchapters.blogspot.com (links to first chapters of hundreds of books)
www.guardian.co.uk/books (Guardian Unlimited book reviews)
www.jonathanames.com (see the Literary Dick section)
www.nytimes.com/books (New York Times book reviews)
www.writers.net (excellent site for published and unpublished writers)
www.bookslut.com (literary blog, with articles and links)
www.bookninja.com (perhaps the best literary blog, with plentiful links)