Some Q:s
#1 What's the rationale behind favoring recent blog updates? In my experience, recent updates make the weakest search results, more prone to updates and link breakage, and overall tend to be of lower quality. I also wonder if promoting recent content might incentivize pumping out low-quality entries to increase the odds of being listed.
#2 In dabbling in the domain I've always ended up with an almost absurd skew toward technical programmer:y blogs. While there is a strong overlap between the cohort with a blog, and the cohort with programmer interests, I feel it would be more inviting to other groups if other interests were better represented. Is this something you've thought about, and if so, what do you think might be done?