For those who may not be familiar with The Atheist Spot, it is a social bookmarking site, a la Digg and Reddit, exclusively for stories that we are likely to enjoy.
The site, whose tagline reads “In our minds we trust”, allows users to submit links that are voted up and down the news hierarchy. There are a variety of subcategories including Interviews, Video & Audio, Science & Technology, Events, and Books within which users can better classify their submissions.
Whether or not your submit links to the site, there is a wealth of great links on the site for all atheists, agnostics, and freethinkers.
Edit: I no longer use Sociable. I use SocioFluid which does not as easily allow for one to code in a custom bookmarking site. AtheistSpot is still pretty rad though, and you should totally use it.