Nope the service is free, you pay for the books and other content.
"Some of you said you want one but agree with me that the $359 price is
steep, even if you don't have to pay extra fees for the cellular Whispernet
service that lets you download books directly to Kindle in under a minute"
The Kindle has to use its own proprietary network? It won't work off a
simple wifi? Ah, I'm guessing they charge for that service.