Just put a GSM/GPRS/EDGE/whatever3G modem inside and let the user pay for the bandwidth. That would also make the device cheaper (you don't have to pay for the lifelong bandwidth usage of the device) and available in just about every human settlement on the surface of Earth that has phone coverage. Most carriers have an unlimited data plan available.
That Amazon removes a layer of complexity (in this case, billing) is a huge plus. If I had to pay $30/month to use the Kindle, I probably wouldn't have bought one.
Just put a GSM/GPRS/EDGE/whatever3G modem inside and let the user pay for the bandwidth. That would also make the device cheaper (you don't have to pay for the lifelong bandwidth usage of the device) and available in just about every human settlement on the surface of Earth that has phone coverage. Most carriers have an unlimited data plan available.
Going EVDO-only is remarkably dumb.