"I think this is probably one of the main reasons that the Scandinavian countries are ahead in the mobile game. You can get cheap plans that include an unlimited amount of text messaging"

I'm from Scandinavia and this isn't really the case. Data is more expensive in Sweden than in US. The US market has done a lot to make it easy for people to use data on their mobile phones. Sure, we have advanced phones in Sweden but that's about it.

Some countries with cheap data-plans for mobile: http://gammalife.blogspot.com/2008/02/pricing.html