Work by Matthew Hurst on mapping the blogosphere has been blogged around recently, particularly because of his cool hyperbolic graphs of the huge data set of linkages, one shown above. I post here because I've got friends reading on LiveJournal -- I know LJ folks occasionally wonder why the press about social networking sites rarely mentions LJ, favoring MySpace and others. One reason may be that LiveJournal is a fairly close-knit and separate community site, with a lot of internal links via friends lists, and not a lot of other blogging post cross-over or linkage in. (I don't know how he handled syndication on LJ friends lists, if at all.)
LiveJournal's small network cluster is shown in the image as cluster #3. The others are (1) DailyKOS, (2) BoingBoing, (4) other political bloggers, (5) porn, and (6) sports fans. LiveJournal is further out than the porn fans, but bigger! Smaller than sports fans, though.