A while ago I was thinking how a every region should have a WikiLeaks style service so people could leak information about their local councils and government. Localeaks.com seem to have a good system set up to do just this.
Using Localeaks, you can send an anonymous tip, including a file, to over 1400 newspapers in the U.S. through one online form. Choose your state. Choose the newspaper. Enter your information and submit your anonymous tip.
Each drop-box consists of a secure web connection and a form that encrypts both files and the text submitted (then destroys the originals) as well as removes identifying metadata from documents. The system also makes every effort to leave no traceable remnants from the transaction, such as identifiable session cookies on the client side or logging of any IP addresses on the server side.