A blog Is ...A blog is immediate.
We're witnessing the emergence of "immediate media" now.
Immediate media is inclusive of many new technology media: camera phones giving you a window into something happening halfway across the world right now, blogs publishing ideas right now, (Monday at noon in Boston for someone in California at 9:00am to pick up and in Tokyo at 1:00am Tuesday morning to read, think about and improve on), as well as, wikis, fresh and immediate -- documents which can be trusted to be as up-to-date as anything you read.
We want it now. We don't want to wait.