This probably only applies to people in the southeast, but I'm not sure where the Chick-Fil-A's are around the country:
I stumbled across this website and decided to sign up since I love chickfila so much. :P I ended up winning a party tray! I'm like "hummm", I bet everyone wins, so I tried it again using different information, and it came back saying I didn't win.... so I'm like, um, maybe I did win a party tray (not a big deal, just a tray of like 100 chicken nuggets), but still.
If you guys got a few minutes and live near a chick-fil-a, sign up and see what it says. They mail the certificate to the address you enter.