Open Letter to Support Mandatory Open Access
The Alliance for Taxpayer Access posted the entire letter to the U.S. Congress regarding the NIH open access policy, signed by 26 Nobel Prize winners.
In case you might wish to use some of the language/ideas when you contact your Senator:
http://www.taxpayeraccess.org/bof.html
The ATA has an update regarding the Senate vote:
http://www.taxpayeraccess.org/nih/2007senatecalltoaction.html