I think this is all nonsense. Google's work should be to separate good content from bad content. Now, they are inverting the relationship and saying that web masters should be responsible to handle that information to them.

This is wrong in several levels. First, Google starts to dictate what is acceptable or not in their index, using tools like webmaster central and all the "semantic web" talk -- Why should I care?

Second, it creates the incentives and the opportunity for bad guys to do well. If you need to do all this overhaul of a web site, the only people willing to do the work will be the very same ones that created content farms in the first place. After all, they are the ones that make big buckets from Google, not the after hours hobbyist that maintains a single web site.