If you think you know how Google ranks blogs you are wrong unless your name is Andy Beard
Since RSS is such a part of blogging I think it would be wise to talk about how Google really ranks blogs and blog seo. Blogs are not static websites and Google does not rank them the same and rarely even lists them in what we call organic results. Google actually segregates blogs to Google Blogsearch.
There are 5 of 6 things that determine how your blog is ranked by Google.
The number of subscribers you have in Google Reader.
The number of blogrolls you are in and the quality of the blogs in those blogrolls.
How many times your Google search engine listing is clicked.
Social bookmarketing posts and the number of times you are Dugg ect.
The number of times your URL appears in conversations, think Gmail.
Google adds all this up and then decides how to rank your blog. If you are doing well in their eyes you will begin to appear in organic results.
I hope this article and the links above give you some insight into how Google looks at your blog.
= Chris Lang