This is not a direct response to your question but I think it's tangentially relevant. I suspect that reports of the death of the hotspot have been somewhat exaggerated and that genuinely "unlimited" data plans are still relatively expensive.

It seems that The Cloud has a special offer for Nokia tablet owners of hotspot access for a tenner a month. If I were still in London, I think I'd find this more attractive than 3G. http://www.thecloud.net/content.asp?...=4&content=236