A science fiction blog that I have been following for some time, SF Signal, is right now being promoted from the home page of the Fantasy Tavern. SF Signal is a very well done blog, supported by multiple contributors. There are almost daily updates, usually more than one, tracking every scrap of news -- tidbits as they are called -- concerning the science fiction genre. Fantasy and horror slip into the mix as well because science fiction fans generally have a soft spot for these less technical genres.
The Fantasy Tavern is my genre focused website, and every two weeks I update the Fortnight Feature, which is meant to bring attention to genre-related websites. The feature is free and open to submissions from websites about fantasy, science fiction, romance, horror, and their various subgenres. For complete details about how to promote your website for free click here.