Small Business Opportunity Act of 2009 - Directs the Administrator of the Small Business Administration (SBA) to establish and implement a program under which the Administrator shall pay, with respect to each SBA-guaranteed small business loan entered into after the enactment of this Act, 100% of the interest due for the first year, 75% for the second year, and 50% for the third. Terminates the authority of the Administrator to make such payments at the end of the the third year following enactment of this Act.