Strategic Deterrent Sustainment Act of 2007 - Directs the Secretary of Defense to report to the congressional defense committees respecting the capability of the U.S. industrial base to: (1) maintain, modernize, and sustain the Minuteman III intercontinental ballistic missile (ICBM) system until at least 2030; and (2) replace the Minuteman III intercontinental ballistic missile with a follow-on land-based strategic deterrent system after 2030.