I think what Bill said there is pretty accurate. With the Mudcat there's a sense of writing to people who are actually there, and who are gooing to respond, rather than talking to the wall. A two way process rather than a monologue.

However I'd be very surprised if there aren't Mudcatters who have set up web logs, and it'd be interesting to visit some. There are definitely Mudcatters whose blogs would be much more likely to be interesting than the general run seem to be.