Finding quality blogs is not a problem. However, ranking them is
So I did a little research and found these facts:
- I liked the Technorati Authority score that says how much a blog or site is talked about in other blogs in past 180 days. Technorati Authority score of 1234 means, within last 180 days, this blog had earned 1234 links from other blog. So, as the time goes by, the score also changes. So, this algo is totally about conversions on other blogs, not about traffic.
- While, Alexa rank is purely based on Traffic or Hits on a site or blog.
- Google PageRank is also another factor for blog quality. But, it depends on the all time Link Popularity of a site or blog. But, it does not show the recent popularity, like technoratti does.
- Another good way to Rank a blog post in Google Reader is through PostRank(Previous AideRSS) that includes Rank of Posts by Engagement (Details about ranking is here: http://www.postrank.com/postrank). In Twitter, @aiderss confirmed me that you can also see the rank of blogs’ engagement level in Google Reader Folder view.