Great post by David Worlock this. Touches on porn and dark communities of subscription based information. Best lines of the piece though are below:

What we are not getting our heads around is the relationship of the mobile network , mostly owned and controlled by third parties  , and the Internet. It is a real issue , and one that must be tackled before access and tariff barriers become the real issues

via David Worlock | Developing digital strategies for the information marketplace | Supporting the migration of information providers and content players into the networked services world of the future..