Criteria #1: Google PageRank (0 to 10): Google PageRank is a link-analysis algorithm that interprets web links and assigns a numerical weighting (0 to 10) to each site. High-quality sites receive a higher PageRank. The actual PageRank number was used in the Power 150 ranking algorithm.
Criteria #2: Bloglines Subscribers (1 to 20): Bloglines displays the number of feed subscribers. Subscriber ranges were determined (i.e., more than 20, more than 30, etc.) and each range was assigned a number (1 to 20) that was used in the Power 150 algorithm.
Criteria #3: Technorati Ranking (1 to 30): Technorati ranking analyzes the number of sites pointing to a particular blog. The more link sources referencing your blog, the higher the Technorati ranking. Similar to the Bloglines Subscribers value, Technorati ranking ranges were determined (i.e., top 9,000, top 10,000, top 20,000, etc.) and each range was assigned a number (1 to 30) that was used in the Power 150 algorithm.
One has to stop blogging as a method of storing info. Readers are not working for me, and I never get round to del.icio.us. I need my own intranet.