On my commute into the office this morning I listened to the Meet the Author: Stephen Fry podcast from Apple. I highly recommend it. Fry is as entertaining a raconteur as ever, and his meandering history of computers and the internet is well worth listening to.
However, the meaty stuff kicks off at around 43 minutes in, as he starts talking about the reaction of journalists to Twitter and moves onto the relationship between the web and our culture. Mach to agree with, and much to provoke thought.
You can grab it from iTunes.