Obligatory Reading of the Day: Opening up Scientific Culture

Why are so many scientists reluctant to make full use of Web 2.0 applications, social networking sites, blogs, wikis, and commenting capabilities on some online journals?
Michael Nielsen wrote a very thoughtful essay exploring this question which I hope you read carefully and post comments.
Michael is really talking about two things – one is pre-publication process, i.e., how to get scientists to find each other and collaborate by using the Web, and the other is the post-publication process, i.e., how to get scientists to make their thoughts and discussions about published works more public.
Those of you who have been reading me for a while know that I am thinking along some very similar lines. If you combine, for instance, my review of Rainbows End by Vernor Vinge with
On my last scientific paper, I was both a stunt-man and the make-up artist with Journal Clubs – think of the future! with The Scientific Paper: past, present and probable future, you will see a similar thread of thinking.
But, what do you think?