Why does my site have a PageRank of zero?

A page may be assigned a rank of zero if Google crawls very few sites that link to it. Additionally, pages recently added to the Google index may also show a PageRank score of zero because they haven't been crawled by Googlebot yet and haven't been ranked. A page's PageRank score may increase naturally with subsequent crawls, so this shouldn't be a cause for concern. To learn more about PageRank, please see http://www.google.com/technology/index.html