In the past weeks I was reading (well, listening the audiobook to be honest) Free! by Chris Anderson, about the economy of free. It's really fascinating and the research he did about all kind of enterprises that base their business model on free stuff is impressive. I really suggest you read (or listen) that book, specially if you're a web worker, you'll learn many interesting things.
P.S : By the way, it was the first time I've got the audio version of a book and it really increase your "productivity" because you can now "read" the book in your car, in the commute, shopping, etc. I'll do it again for sure.