In response to the ongoing controversey regarding members' of Congress use of the internet the Sunlight Foundation launched Let Our Congress Tweet! Help us tell Congress to "embrace the communication technologies that we already use" like Twitter, YouTube, Facebook and MySpace. If you're on twitter I hope you sign our petition to show Congress that there is no reason our elected officials can't communicate with us where we are!
On the site, you can watch who's tweeting to sign the petition. This kind of grassroots feedback to Congress has the potential to create real change.
If you want more information on franking rules check out Sunlight's Open House Project. The Open House Project is a group of people who wrote a report to find ways to make Congress more technologically open and accessible to the public. If you want to know more about the franking rules check out the chapter on Member Use Restrictions here.
Full Disclosure: I am the Online Organizer and Outreach Coordinator for the Sunlight Foundation.