There is a significant momentum building for stronger executive control over Internet connectivity to private-sector networks that are designated as "critical infrastructure."

The proposed CyberSecurity Act of 2009 would allow the president to designate a private network (such as a SCADA system) as critical, and in the case of a declared emergency, shut it off from the Internet.

As you can imagine, there is resistance to this from multiple parties, including those industries who fear additional government regulation and also privacy and anti-censorship advocates who fear "scope creep" in the legislation.