Hey!
Look this: if you search
site:amazon.com "Auto-delivered wirelessly to Kindle" in google you obtain 61 results.
I tried some of them and they are not avalaible now, but google's cache stored them.
Look this:
http://64.233.183.104/search?q=cache...&client=safari
Book number five:
Auto-delivered wirelessly to Kindle via Amazon Whispernet
Amazon whispernet?
L.