As long as any ijit can "publish" anything she/he/it wants to, it will remain so. I don't see it changing. How many of these self-published books have you bought?
caw[/quote]
I buy a lot of books, usually off the regional author's shelf, and don't pay a lot of attention to the publisher; however, I do know that many regiona-author books are self-published.
There is a very good article, page 43, in the Jan/Feb 2007 Writer's Journal Magazine, by Carrie Carr. She self-published, sold 1700 books to Waldenbooks, plus she got her books into Barnes and Noble and other stores. She obtained her own ISBNs, set up her own distribution with Baker and Taylor and Ingrams. She was contacted by producers of the Tyra Banks Show, 20 agents and her novel has been considered by Sony Pictures for possible adaptation.
Of course for each success story in self-publishing, there are many unsuccessful stories that you won't hear about, and it is expensive. I believe Ms Carr's total cost to publish was around $2,000.