In addition to the various state laws regarding identity theft, there are also several laws at the federal level. The links below will help you become familiar with the federal statutes that address this crime (and hopefully help your own efforts at developing a strong identity theft defense and protection system).
IdentityTheft.gov – The federal government’s one-stop resource for identity theft victims.
Federal Identity Theft Information (Great info courtesy of Florida’s AG site)
Federal Identity Theft Publications