Thanks for the clarification - the point remains that it's still a little unclear how much value for money the 3G represents over the WiFi version.
Just about the best deal I've found for PAYG mobile broadband is via Three - where you can get 12GB of data that's valid for 12 months for £70. So, assuming someone plumps for one of those SIMs, the total cost would be ~£349 for the year for a 3G unit, versus the £229 for the WiFi only. I'm using R...
I actually tested whether my SIM card from 3 mobile would work in one of the 3G units that are being demoed in branches of GAME - it worked without a hitch. Good news!