I saw on Beth's Blog her posting about what her blog is worth. This comes around every once in awhile. Some new tool comes out. Folks try it. Looks cool or doesn't. In this case, it does not seem to explain much on how the numbers are derived.
I tried a few of my blogs and then a couple of others to see a comparison on how it works. I probably should try a better sample to really get at it but for now:
Steve's 2 Cents
Joyful Jubilant Learning
Some pieces of this make sense. Some don't.
What is value?