I don't think the question of "How are people going to make money with weblogs?" really matters. Most 'blogs are inherently personal in nature. Your "credibility network" relies on 'blogs written by people who lead interesting lives (not me), people who have interesting opinions, or people that you personally admire... all based on your definitions. Hence the reason for your post, right?

I agree 100% with your "credibility network" opinion.

Maybe the question should be, "How are people going to make money by utilizing the technology behind weblogs?" 'Blogging technology now allows people to publish and update their "net_person" webpages without requiring knowledge of any underlying conveyance. Back in the day, we had to learn how to code HTML by hand; today, we supply userid and password, and we're able to stake our claim on a chunk of 'net real estate. Throw in RSS/RDF feeds, and you've got the basis for "enterprise-level" information sharing.

I realize that this isn't a new idea. But, simply because 'blogging is so attractive to the general public nowadays, it's actually driving the development of readily-accessible Internet (network) technology. With regard to the bottom line, why not apply this already-developed technology to solve an information distribution problem... as opposed to rolling your own, proprietary solution?

If a company can update their own website's support documentation ('blog), and provide a way for their customers to update their local documentation repository at will (feed), then they'll make money by reducing the documentation/distribution effort in time alone.