I agree — but that need to post regularly, to maintain a vocal presence in the sphere or risk dwindling away to unread obscurity, is pretty powerful in blogging. Competition for eyeballs is nearly unlimited (anybody with an internet connection and an opinion, essentially) and on the internet, if you're not posting, no-one knows you're still there. One thing that I like about a group blogging experience like CN is that it reduces the need by spreading posting out among several authors, making it more of a shared community sort of experience -- our del.icio.us feeds of interesting articles or things we've read being an example of that. There seems to be some notions floating around these days reassessing some of what blogging has been over the past year or so -- for example Ezra here, Ed Kilgore here, and Dave Pollard here -- that I think probably has a lot to do with the end of the presidential election cycle, but I couldn't say where if anywhere it might lead.