Are there any countries that don't charge for mobile data?

Question in from a reader this morning. I initially responded, ‘probably not,’ nodded toward some of the fixed charge models in North America and said I’d put the question up. I’d welcome your perspective:

We were having a brainstorm this morning about the state of data charges etc in this country and somebody posed the question:
“Are there any markets outside of the UK where all operators that have completely done away with data charges in the similar way that T-Mobile and H3G (with their x-series)?”

Any thoughts?