Jurisdiction and the Internet: Regulatory Competence over Online Activity

Which state has and should have the right and power to regulate sites and online events? Who can apply their defamation or contract law, obscenity standards, gambling or banking regulation, pharmaceutical licensing requirements or hate speech prohibitions to any particular Internet activity? Traditionally, transnational activity has been 'shared out' between national sovereigns with the aid of location-centric rules which can be adjusted to the transnational Internet. But can these allocati...