iPad users in the US are being ripped off. This visualization shows that US users pay some of the highest prices in the world (by $/GB) for their monthly data plans. Click around and explore to see who has the best (and worst!) data rates worldwide.
Small, dense countries like Hong Kong and Singapore manage to offer plans at less than 1/20th the cost (per gigabyte) in the US. Apples to oranges perhaps, but even the UK manages to offer plans for 1/5th the cost. This is even more frustrating given that the majority of iPad users are in the US. Don't we get a volume discount?
On the other hand, French iPad users are paying $25 a GB minimum. Maybe we shouldn't complain...