In spite of its title, there's nothing indecent about the site, though it does feature an obscene amount of bookshelves and related insights, quotations and links to articles. It's a primarily visual and incredibly thorough catalog. Check out its extensive archives.
New question, as we move steadily from print to digital: What could virtual bookshelves for e-books look like? (If a blog paying homage to them existed, it'd probably be pretty short.)
Via Chris Glass
° My blog category "Bookshelf furniture"