Impact of Social Sciences – A blog may get you street credibility, but for formal academic recognition, books are still the preferred medium.

"Could blogs replace books? Michael Piotrowski reflects on the current scholarly debate surrounding immediacy and impact of academic work. A significant issue for blogs is the lack of formal recognition, largely down to the general lack of pre-publication peer review. Books are more formal in all respects, but this doesn’t disqualify blogs per se. Blogs and books have different strengths and weaknesses and should—at least for the time being—be seen as complementary."