If he believes that Blogs are social networks, and if they are then do they follow known patterns like Dunbar's number, and the Small world phenomenon.
Or adversily if they are a form of meta-system in which opinion, social contact and news come together to form a new medium of contact and information sharing.
Further more what drives the blogger? Is it a sense of ego gratification in which they receive an ego boost from third party attention, and feel special / important, which has a positive effect on their self-esteem. Or perhaps a way to eliminate frustration
from day to day life (e.g. an outlet) or maybe they believe that blogging is a pathway into a career into journalism or another field?
I like those questions, but I'm afraid they have nothing to do with Scoble leaving Microsoft.
More standard ones are:
1) What will you miss most about your job at Microsoft?
2) What did you hate/love most about Microsoft?
3) What are you most looking forward to in your new job?
4) What is the disconnect you see between how people perceive Microsoft on the outside and on the inside? What have you learned about this, and will this dichotomy affect how you direct content strategy at your new job as VP of Content?