Just a comment: Sami Tolvanen is the original developer of Eraser, so we're not exactly talking about security newcomers.
I miss more information about the sites. A trust value is OK, but it would be nice to know why a site should be trusted or not, by each reputation category, I mean, comments by users linked to each category. Also, the linkback thing is a good idea, but I saw a few "Trusted blogs" entries, which they explain as "Referenced in blog of trusted authors", but I could not find info about what conforms the criteria for a trusted blog, nor a list of these blogs.