Originally Posted by HarryT
the price difference is essentially a market differentiator for a "premium product"; the difference in manufacturing costs is minimal.
While the latter is probably true, I doubt the former also holds - I would guess that there is not too much left for Amazon of the extra $50 after you take into account the data transfer costs that Amazon has to pay to AT&T and other providers around the world. Especially if you consider that people who do not plan to use 3G frequently would probably not get the 3G version. I would not even be surprised if Amazon was actually loosing money on the feature itself but then gained it back by (likely) better book purchases from the 3G devices.