Puerto Rico Democracy Act of 2007 - Directs the Puerto Rico State Elections Commission, not later than September 30, 2009, to conduct a plebiscite in Puerto Rico on the question of its status and relationship with the United States. Requires the ballot to provide for voters to choose: (1) to continue the present status and relationship; (2) independence; (3) nationhood in free association with the United States; or (4) admission as a state.