From an SEO perspective, you also want to optimize those outpost links. For instance on your LinkedIn Profile, you don't have to use the default My Blog, you can select "other" and use a more meaningful link (with a keyword or two). Then you'll be building your backlinks while attracting new audiences. Some of your outposts may nofollow the link, but optimizing the text is still going to improve your click throughs than using a generic placeholder.
I read "Meatball Sundae" on a flight this week as well. I completely agree. It's well worth a read. For me, what really sold it was Godin's point about how organizations which are successful in new media adopt a consumer-focused mentality from top to bottom (or bottom to top). However, the reality is that very few companies are willing to make serious changes in their business. In short, they look at it as just another channel. Great book and nice review!