Re:"What is the use of a blog. . .?" (Score 2, Informative)

Blogging helps disseminate useful information. If several like-minded people find some information to be useful to them, then chances are it may also be useful to me.

Arnold Kling published an article long ago which elaborates on the theme:

http://www.corante.com/bottomline/articles/2002062 1-875.shtml