Wait is this free or does it cost money?
Noticed this:
http://www.amazon.com/gp/help/custom...deId=200375890
Kindle (U.S. Wireless) users: We'll send personal documents to your Kindle via Whispernet while inside the U.S. wireless coverage area for a fee of $.15 per megabyte.
Kindle (Free 3G) user living in the United States: If you transfer personal documents to your Kindle via Whispernet while inside the U.S., the fee is $ .15 per megabyte. When traveling outside the United States, a fee of $.99 per megabyte will apply.