The Register reports that Google is considering the removal of blogs. The problem isn't blog v. nonblog, the real problem is distinguishing authorative from non authorative sources of information.
There is a large number of non-authorative sources of information like link lists and affiliate programs. The truth of the matter is that that there needs to be a mechanism for denoting the type of information.
For that matter, the most part of what appears in newspapers is not authorative writing...it is a reprint of an article that appeared on the news wire.
For the Net to really thrive, there needs to be auditable mechanisms that report the type of information. For example, something should be marked as an ad, an opinion, a researched article, etc..
I feel that the best mechanism for such an event would be a human edited source like Zeal or DMOZ.