Sony isn’t Amazon, everyone knows that. Like Sony was going to give free unlimited 3G service, that would have been awesome, but unfortunately that isn’t happening. Now, we have heard that there will be a 20 MB limitation on 3G downloads. This is the same limitation as the iOS App Store 3G. So it looks like you wont be able to get any full games downloaded on 3G, unless they are really small.
The Sony employee who did confirm this information for that Japanese website did admit that the limit may be raised or dropped entirely. We only hope.