The White House released its National Action Plan for its participation in the Open Government Partnership. The plan builds on (but doesn't replace) the Administrations' original Open Government Initiative. While there is nothing on access to scientific publications in the plan, there is an explicit action point on scientific data:
"In many cases, the government has information that can be leveraged to help consumers make better decisions and to aid scientific research. To unlock the potential of this data, the U.S. will: - Publish Guidelines on Scientific Data. We will develop Federal guidelines to promote the preservation, accessibility, and interoperability of scientific digital data produced through unclassified research supported wholly or in part by funding from the Federal science agencies."
You can see the whole report at: http://www.whitehouse.gov/sites/default/files/us_national_action_plan_final_2.pdf