When I talk about blogging and why I do it, I talk about disseminating and sharing information. I also talk about using my blog to keep track of information for myself (a nice side benefit). Another tangible benefit is that blogs allow for a give-and-take that seems different from an e-mail discussion list or online forum.
As I write this, I'm thinking of Charles Bailey who sent a comment to alert me to a list that I had not seen. I also think about the comments I've received where someone has been able to give some insight into an organization/process that I was not privy to. Those comments then become part of the knowledge shared in the blog. The truth is, we all have access to different information and our blogs allow us to share and combine what we know.
Sharing...this is the benefit of blogging...and the benefit of digitizing materials.