The more outgoing and informal social nature of the blogosphere opens the opportunity for exploiting more socially-oriented features, such as credibility and popularity, for searching, recommendation, and other tasks. In this article, we provide evidence that one of these features, namely blog popularity, has been underexploited by current search engines, including specialized ones, and that there is low correlation between blog popularity and their perceived importance in the Web graph as measured by PageRank. Moreover, we also provide evidence that incorporating popularity into the search engine’s ranking may result in significant gains in retrieval effectiveness and thus user satisfaction.