Well guess what? Instead of eating lunch, I went out an worked on it, basically resetting and readjusting the idle speed and idle mix screws (for the 10th time it seems).

It appears, fingers crossed, to be happily idling along at a steady 750 rpm. I am guessing it's not perfectly tuned, but I am not going to mess with it until I either drive it, or it starts acting up again.

Thanks for all the help as I hack my way through owning my car!