OK; I didn't understand how the antenna worked. Now that I've disassembled (and reassembled), I get it now. For those who are interested (and hopefully this comes up on searches in the future), I'll try to be more detailed.
Build dates after 2/2/08 (and a V6?) have a PATS antenna that sits underneath the ignition lock cylinder. There is a ring that goes around the cylinder, but the actual antenna is the flat piece on the bottom. If you need to replace the ignition lock cylinder, you really have two options:
1. Use a pre-2/2/98 cylinder with a non-PATS key (currently retail parts store about $35 for cylinder and 2 keys), and secure the old PATS key to the PATS receiver (zip tie, electrical tape, etc.). There is enough space under the bottom steering wheel cover for this. One option is you can move the receiver and put a sleeve on it or something to hold it and the key, then you have an additional layer of anti-theft - remove the key from the PATS receiver, then the fuel pump won't turn on so the car cannot be driven!
2. Use a post-2/2/98 cylinder with PATS keys (currently retail about $80 for cylinder and 2 PATS keys). To program, as suggested by BrApple, move the PATS receiver out of the way after replacing the cylinder, then to program, hold the old key to the receiver while turning the new key, turn off, move PATS receiver next to cylinder, turn key again to program new key (might want to check exactly how long each step for this procedure).
If the key is stuck in the cylinder, you can get it around the lower steering wheel shroud but you have to take the lower kick panel off to maneuver that piece. It is easier to push in the button to remove the lock cylinder if you remove the top steering wheel shroud (only 2 screws, so why not?).
In the end for me, I doused with WD-40, let it sit for 5 minutes, still couldn't remove the key. I pulled the cylinder, went to Autozone and bought the non-PATS cylinder, installed it, had the exact same problem hanging up in the ignition! I then figured out how to work the old key out of my old cylinder (was able to do with it removed from the car), swapped the cylinders back to the original, and my main key works like butter (my spare key still gets hung up at the end - can't tell why besides it is much less worn).