The Omnibus Appropriations Bill that was recently passed by Congress, included a provision that will greatly improve access to taxpayer-funded research. Under the bill, federal agencies (with research budgets more than $100 million per year) within Labor, Health, and Human Services and Education will be required to provide the public with online access to articles funded by that research no later than 12 months after publication.
For more information, see the SPARC announcement: http://www.sparc.arl.org/news/omnibus-appropriations-bill-codifies-white-house-directive