Blogging the new MUD?

I have to admit that before reading Sherry Turkle's article I had no idea what a MUD was (sleeping in FTVMS101 lecs didn't help). But it got me thinking, how many people do i know actually use MUD's? Not many. After reading her article about the exciting ways one can modify his/ her personality I would have expected MUD's to be alot more popular. Then another thought occured to me. Could it be that just as how the user interface on the imac's and pc's updated and eventually replaced the old DOS systems the same thing is happening with Blogs and MUDs? Blogsters are able to project their ideal image by customising colour schemes and designs etc as well as adding photos which may or may not be them. i guess the main difference is the "liveness" between MUD's and Blogs.
U guys have any ideas?
hope i made sense