Let me get this right - this is a re-write of something on Google's blog, about a "Web2.0" equivalent to logging 404's, called "free links to your site"... why is this the top story on hacker news?
sigh
I want a "from now on, invert the votes of anyone who upvoted this crap" button.
All I know is, this post made me check out Google WebMaster tools, and using the tool he pointed out I found a whole set of invalid links people had made to my site that need to be redirected. So it was valuable for me.
Google should seriously invest a little bit of money and pay to have the site design for Matt Cutts look better. Add a custom design (not a template) and maybe say somewhere that he works for Google. I've sent some customers to that site, and they don't take it seriously.
The first comment on the article brings up a good point too. Rather than spamming everyone who links to you, you can also just change the bad URL into a 301 redirect, redirecting to where you want that URL to go, and Google will pick that up.
sigh
I want a "from now on, invert the votes of anyone who upvoted this crap" button.