From Edward Felton’s Freedom to Tinker, this page, State Super-DMCA Bills and Laws, provides a chart listing legislation introduced in nine states (AL, CO, FL, GA, MA, MD, MI, SC, TN, TX) that would preclude corporate and personal use of firewalls, routers and encrypted e-mail.
See also this related posting from LawMeme about an April 2 public hearing for the Massachusetts DMCA legislation “to establish a crime of illegal internet and broadband access and establishing penalties therefor,” House Bill No. 2743. From CNet, see DMCA critics decry state-level proposals, and from Politech.com, see this posting that quotes language from the Michigan (this amended section takes effect March 31, 2003) and Colorado legislation.