Amazon to Sell Books by Page, Display Books You Own

Josuah writes "Forbes is reporting that Amazon plans to sell books by the page, so you could purchase only the excerpt you're interested in. What I found more interesting though was the mention of a program called Amazon Upgrade, which will allow you to view books you own from any web browser. Sounds awfully similar to the MP3.com case. I'm guessing Amazon Upgrade also means you need to purchase all your books from Amazon. Interesting value-add proposition."