Scoble is right. WHile MS is still very agile it has become so big that it can be hard to get the right people (the ones who can commit money) together with other people who have the right (or out of the box) ideas.
Scoble likes to talk about 700 Microsoft bloggers and how execs read them. Well they do read some of them. I'm sure Scoble's gets read and talked about a lot. But I don't think too many of them are reading mine. Although to be honest mine is not the same sort of blog as Scoble's. And that is a whole other thing about blogs. They serve different purposes for different people. I would feel comfortable talking to management about my ideas but it would change the nature of my current blog to use it as a podium to talk to management.