The persian weblogs

Recently, I had an opportunity to review some of Persian weblogs. I found some very good weblogs by following the links. I really enjoy reading them ( from personal experiences to hot social and political issues of Iran) . They are very informative. I don't know which part of weblogs are not retrievable by search engines and are part of invisible web (Yazdan knows better). Is there any subject directory for Persian weblogs? (Persianblog has a subject directory but it is not searchable)

From the LIS perspective, there are many subjects regarding to Persian weblogs to be researched by LIS students. It would be great getting the results of such studies.