blogging vs writing?

Here is an article by author and blogger Sophie Cunningham called "Caught in the Blogjam". She talks about a lot of writers you might have heard of (Michael Chabon, William Gibson, Poppy Z Brite, Barbara Ehrenreich and on and on) who manage to teeter on the edge between blogging and writing. Does engaging in blogging help or hurt our main efforts?

http://www.theage.com.au/news/books/caught-in-the-blogjam/2007/07/19/1184559950812.html

I expect many of the arguments and commentary in the article apply much the same to Illinois Wesleyan faculty as they do to full time writers of fiction and non-fiction.