I was recently recommended this Website Grader from HubSpot, which does a free, simple breakdown of your website’s SEO. This showed a few gaps in my site that I should take care of and I think could be useful for you. The blog section is especially helpful for bloggers.
Free, quick, simple, helpful. Love it. (HT @lofitribe)
Nice: Smorgasblurb ranks 814,066 out of 2,000,000. Haha. Some good advice came out of the ensuing report–thanks Sig.