No its merely that Entourage cannot subsidize the ebook purchases like Amazon can. Amazon can sell the books for close to cost or even at a loss and still profit. Smaller newer Book sellers cannot.
Look at the prices at Powell's for instance
http://www.powells.com/ebookstore/eb...?margin=eBooks Powell's is legendary in this part of the world for good prices on new and used paper books. But their ebook prices are more like you would find at sellers other than the Amazon's and B&Ns of the world.
The lost Symbol is currently $15.75 at Powell's