Okay...I'm an idiot. I must've been REALLY stressed yesterday when the car broke. I went out tonight (I spent all day reading about the shift cables and looking for one [found one on ebay - didn't buy it]) and tried the test procedures for the key lock cable and the shift lock cable and everything went fine. The shifter unlocked and moved normally. Like I said, I'm an idiot.
By the way, here's an important post from another site about shifter cables and bracketsAnyway, even after twenty-four hours, when I got into the car I could still smell that acrid smell, and it seemed to come from the center console or near there. Imagine my surprise (not really) when I read that the ecm is located under the center console. Right now it's dark, cold, and my garage is so full of junk that I really need to roll the car outside so I can have some room to crawl under the dash, so when I can, I'll hook my meter up to the diagnostic plug and I fully expect to see the needle peg-out and stay there. Soooo, time to begin the hunt for an ecm. Wish me luck. I'll let you know what happens (if indeed you're out there). Seems the least I can do.
By the way, here's an important post from another site about shifter cables and brackets