It turns out the NSA has a consent form you can fill out to give the agency permission to monitor your overseas phone calls and e-mail.
The form (.pdf) comes from a procedures manual (.pdf) FOIAed by John Young at Cryptome. It looks like it was crafted for government employees who want to go the extra mile for Uncle Sam. But there's no reason you can't volunteer -- unless, of course, you have something to hide.
For "purpose", I'd write, "To win the War on Terror." Effective: "Until the War on Terror is won." I suggest sending it to the NSA's main address at Fort Meade with an appropriate Attn line:
National Security Agency
Attn: Spy on Me!
9800 Savage Road, Suite 6740
Fort Meade, MD 20755-6740
This is a great opportunity to show that you stand behind your president. The Specter bill is poised to make the NSA's warrantless surveillance of Americans legal, but it isn't yet the law of the land, and a federal judge has already ruled the program violates federal statute and the Constitution. If every man, woman and child in the U.S. fills out this form and sends it to the NSA, the agency, and President Bush, will no longer be breaking the law.
Remember, there's no Terrorist Surveillance Program without U.
Forward this to everyone you know.