Did you know that how Google Ranks Blogs

Google Blog Search is a new tool that is gaining popularity on the Internet lately. The Blog Search might also be a good source of visitors if your blog rank on the first positions for specific keywords, but what factors does Google take into account to elaborate the search results?
The “Seo by the Sea” blog has an interesting article analyzing a new patent from Google that contains some indicators about the positive and negative factors affecting blog ranking, check it out:
Positive Factors:

• Popularity of the blog (RSS subscriptions)
• Implied popularity (how many clicks search results get)
• Inclusion in blogrolls
• Inclusion in “high quality” blogrolls
• Tagging of posts (also from users)
• References to the blog by sources other than blogs
• Pagerank

Negative Factors:

• Predictable frequency of posts (short bursts of posts might indicate spam)
• Content of the blog does not match content of the feed
• Content includes spam keywords
• Duplicated content
• Posts have all the same size
• Link distribution of the blog
• Posts primarily link to one page or site