I have never used an e-ink device for browsing the web - yet, somehow, I suspect it wouldn't be a great experience. The screen is too slow, after all.
Also, the 3G connection is a big issue. I mean, the way it is set up, with a free connection, I am sure could not support browsing the web - I am sure they cannot offer you a free connection while allowing for the download of large quantity of data. They would have to come up with a new pricing plan as well.
In short... it would be nice, but I wouldn't hold my breath... I don't think it will ever happen, frankly.