So, I can identify with the common claims: "paper books are tangible"

In my experience the vast majority of them become outdated within a few months anyways. Why pay $60 for a technical book when you can read it online for $2?

Also a great feature of safari is the fact that it has more than just o'reilly books. They even have the prentice hall "learn to be a PHB in 10 minutes" type books! Now I'm just waiting for the Wiley books.