Ok, I will give the slide-hammer technique a try. I don't think the wedge will come all the way out of a butted steerer tube. (Ill check to be sure it's butted)

I have a giant electric soldering iron I am going to shove up there and see if I can warm things up.

I am worried about the headset also. It's still smooth now but I like the slide hammer idea.

If the threads pull out of the stem, put on your safety glasses.