The reason I have posted this is that I noticed a deal on hotukdeals for a Sony PRS350 Silver Edition eReader, when for £20 more you can get an eReader with a web browser and free worldwide 3g access. This of course means you can browse the internet for free with no data roaming charges anywhere in the world (Coverage is at: http://client0.cellmaps.com/viewer.html?cov=2&view=intl).
I emailed Amazon asking if this was the case and within ten minutes they emailed me back confirming this. There are many videos on YouTube showing this eReader in action. I have ordered one from Amazon and am awaiting dispatch at the moment.