BlogRolls are obviously blog-networks.
But there's a commercial version too. Here's a good analysis of the value of joining a blog-network over playing solo, and how the GoogleJuice works to everyone's advantage.
Might be interesting to compare how blog-networks are rather like gangs.
- BlogAds stimulates creation of these networks : http://publications.mediapost.com/index.cfm?fuseaction=Articles.showArticleHomePage&art_aid=30957
Why not join?
Bloggers rate their contributers? : http://calacanis.weblogsinc.com/entry/1234000613046373/
|| Bends the BlogoSphere? || Yes || Yes || (Just as mass distorts space, these things form gravity wells in the blogosphere) ||
|| GoogleJuice || Yes || Yes || ||
|| Shape || Rhyzome || Hierarchy || Interesting difference. See also NetworksVsHierarchies ||