The Research Blogging web site is a nexus for peer-reviewed literature and serious academic blogging about it. (No, that's not a contradiction in terms.) Research Blogging helps readers find critical analysis of scientific reporting by pulling these scholarly blog posts together. Many of these blog posts in reaction to published articles are written by experts in the field and can help you put the article in context. From the Research Blogging site:

While the majority of posts indexed by Research Blogging are in the hard sciences, there are a reasonable number in the area of information and library science, broadly construed.

To join the commentary, you must register. Once you've done that, you get a code snippet to include in your posts that are about peer-reviewed articles. Research Blogging then adds your post to its index. Being a scholarly effort, there is peer review of posts indexed by the site -- if other registered research bloggers feel your post does not follow the site's guidelines, it is removed from the index. This keeps the content relevant to the site's mission.