Searchable Database for Campaign Contributions
"The purpose of CampaignMoney.com, a non-partisan web site, is to make available in the easiest way possible the names of financial donors to federal political campaigns. These records are a matter of public record provided by the Federal Election Commission."
You can search for campaign contributions by Name, Employer, Occupation, City, County, Zip Code, State; by Candidate, PAC Committees, 527 Political Organizations, Lobbyists, etc. There are also pre-generated reports on Celebrities, Industries or Professions, Companies, etc.
For example, college professors have given 7X as much to Democrats as Republicans from 1999-2008, trial lawyers have given more that 7X as much to Democrats as Republicans, Oprah Winfrey's only campaign contribution since 1999 was $2,300 to Barack Obama in 2007, Rush Limbaugh has made no campaign contributions since 1999, Bill Gates has donated a little over $200,000, split almost equally between Democrats and Republicans, etc.
Search away, maybe you'll find yourself!! Please report any interesting findings.