In the U.S. there is great debate over this subject.
A writer has done a comparison of what would occur, if the cell phone network was used as a model, to compare internet neutrality, and to kill it or allow added control and charges.
http://business.newsforge.com/business/06/...l?tid=138&tid=3
Definately worth the read to understand issue facing many in the U.S. market.
Some of the comments following the piece are also worth reading.