My experience.
We got our FP done at Columbus, OH yesterday. I got two FP notice, both of them had different dates on it. I took both the receipts. My wifes FP was scheduled on Sept 19th, 2002. She also got hers done yesterday.
We reached the INS office at 7:45 AM, There was no rush at all. My appointment was at 8 AM. They gave us a form to fill out. They checked our drivers licence (For SSN verification), EAD card and passport. The FP notice did not mention about the EAD card, but we took it just in case.
The whole process took just 20 minuites. We were out of the building by 8:30 AM.