Mayday, the SuperPAC formed by Lawrence Lessig to work for public funding of congressional campaigns, will announce how it will spend its resources this year on July 21. Mayday has raised $12,000,000, and it will spend the money this year on independent expenditures on behalf of five congressional candidates who will pledge to work for a public funding bill in Congress in 2015.
This Washington Post article mentions some of the wealthy individuals who have contributed to Mayday. It is notable that Peter Thiel, who is considered to be libertarian in his views, and who has supported Ron Paul, is among those who is contributing to Mayday.
The 2014 spending will only be on behalf of Democratic and/or Republican candidates for Congress. Thanks to the Center for Competitive Politics for the link.