I think the compressor may be siezing. I found the belt with one of it's ends sticking out by the alternator. It had evidently stopped turning, and then smoked on the crank pully till it burned through. The idler pully moves fine, and the compressor pully spins fine, but the compressor its self is pretty stiff to turn. I'll put one of my spare belts on, then fire it up and watch to see what happens.

Yeah, the compressor is probably toast. I've had several go, and one seize up on me.