H.R.5548: To provide for the continued availability of automated stamp vending machines at facilities of the United States Postal Service serving underserved communities, and for other purposes.

Postal Service Access Assurance Act of 2008 - Requires the U.S. Postal Service to ensure that, to the maximum extent practicable, automated stamp vending machines are provided at all facilities which are owned by or under the control of the Postal Service and provide retail services to the public.

Exempts automated stamp vending machines in such locations from requirements that business operations conducted by the Postal Service and certain other entities be fully capable of accepting $1 coins.