http://www.govexec.com/dailyfed/0805/080905p1.htm
"The Customs and Border Protection bureau has embedded forms filled out by visitors with radio frequency identification tags in hopes of reducing lines at U.S. entry and exit points.
Under the Homeland Security Department's US VISIT program, the electronic transmitters, known as RFID tags, have been placed in the standard visitor form known as the I-94 arrival/departure record. Testing began on the devices at five land border ports Thursday and will continue until next summer.
The forms are issued to visitors with nonimmigrant visas, people entering the country under the Visa Waiver Program and visitors with Mexican border crossing cards planning to stay longer than 30 days. "
