This site offers a searchable database of congressional votes for 104th, 105th, and 106th Congresses. C-Span operates this site. The highlight is a database of campaign finance reports filed from 1996 to the present by House and presidential candidates, political action committees, and political party committees. Check out the link called Campaign Finance Reports and Data. This site is operated by the Center for Responsive Politics, a nonprofit research group in Washington, D.C., that tracks money in politics.
Numerous databases contain detailed campaign finance data for federal candidates.
If you are tracking campaign finance reform efforts in states around the county, this is a good place to start. Each day, summaries of newspaper articles about reform efforts in various states are posted. Each summary has a link to the full story. News stories about campaign finance are available through Yahoo. The articles are from a variety of newspapers, including the New York Times, Boston Glob, Christian Science Monitor, Los Angeles Times, Dallas Morning News .