Ray Ward has this interesting post with links to an article speculating that blogs are the friends of information but enemies of thought.
Of course, blog posts take more thought than most of the e-mails I get. We're in the process of getting Treos in our office - talk about your enemies of thought. With all due respect to the big-city lawyers and clients with whom I correspond, I'm not sure that I've ever learned much from anything written by means of a Blackberry or like device. (But, such devices have enabled them to ponder my own insightful prose as they sit in airports, taxi cabs, and such.)