by One of the benefits of having Wi-Fi on the latest Kindle model is you can use the feature to send yourself documents without incurring a fee:
“If you transfer personal documents to your Kindle via Wi-Fi there is no delivery fee. If you transfer personal documents to your Kindle via 3G while inside the United States, the fee is $ .15 per megabyte. When traveling outside the United States, a fee of $.99 per megabyte will apply.”
This means you can use calibre’s automated news-fetching feature to grab content on a regular basis, convert it to a Kindle-friendly format, and email it to your Kindle 3 every day/week/month. For free. Yes, that is awesome.
By default, the Kindle 3 will try to connect via Wi-Fi before switching over to 3G, so if you have the more expensive model you can still take advantage of this feature as long as your Kindle 3 is able to access a working Wi-Fi network when it downloads new content. Unfortunately, there’s no way I know of to turn off 3G entirely other than buying the model that doesn’t have it–but if you’re that hardcore about saving money then you’ve likely already made that decision.
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As far as can be seen from Amazon’s documentation, if a file is sent to the @free.kindle.com variant of your Kindle’s mailbox it will transfer over Wi-Fi but not 3G, avoiding the potential data charge.
Good news if you’re a skinflint like me!