I've had the problem with the shifter not wanting to come out of park and traced it to a wiring issue, which has since been fixed properly.
It started with the shifter acting up a bit, but I was able to get it to release after squeezing the trigger a few times. Then, it started locking the key into the ignition, and I was able to restart the car, then kill it and remove the key. Now, I can't get the car to release either the shifter from park or the key from the ignition. I've temporarily bypassed the issue by leaving the car in neutral with the parking brake on, killing the engine, depressing the lock release under the column, removing the key, then just pulling the shifter into drive for extra security. I'm thinking it may be a neutral safety switch issue, but there seems to be two on this car: one on the trans and another in the column.
If failed, which one of these switches could cause the problems I am having, or is there another problem elsewhere.
BTW, I have checked and re-secured the main grounds already.