If you don't know how to contact your representative\senator, the ACLU makes it extremely easy and can locate them for you and send a letter on your behalf via this online form:
https://secure.aclu.org/site/Advocacy?cmd=display&page=U...
From the website:
"Today, the Electronic Communications Privacy Act (ECPA), which should safeguard electronic communications records (like your email or chat logs) and the information you share with companies, is in serious need of an update.
The government should have to go to a judge and get a warrant that says it has probable cause to believe you've committed a crime before it can read your email, browse through your social networking account, or track your location."