Learning from Weblogs

In Building New Communities: Learning from Weblogs (a PowerPoint file), Tom Coates of plasticbag.org maps out the role of personal weblogs in community-building online. He has even broken down the communities surrounding a blog into three typical categores: online shared interests, geographical commonalities, and “real life” friends and family.
Why am I not surprised that Tom makes snappy looking PPTs too?