Chris Anderson provides a good introductory course on the economics of the Information Age, but doesn't tell us what we don't already know.
Hacking is intentionally changing something to work other than as designed. Blagging is exploiting someone's ignorance or inattention.
As I was saying … today’s comic from xkcd:
Update, 20 July 2011: I received an e-mail that notes the correct link to Tynt’s opt-out button is now http://www.tynt.com/tynt-users-opt-out. Its author ...