The Blogsphere Ecosystem at The Truth Laid Bear. (The scan this app performs is only on a blog's main page, btw...)
That's just...cool. I added my blog to the ecosystem and got 'sorted' -- the distribution ranges from higher being to insignificant microbe. I came up Wiggly Worm.
Pretty self-explanatory, don't you think?
And the WMDI -- Weblog MetaData Initiative seems very interesting.
Of course, I found all this because the ecosystem is what wizbang is using for categorizing awards, and I was looking at the group titles saying to myself, WTF is 'Best Ecosystem Slimy Molluscs Blog'?