I disassembled a wheel in order to get the hub, and while doing so decided to leave the freewheel attaché to the hub and to remove the spokes first. I was more than a little bit perturbed to realize what I had done. So I laced the non drive side of the hub (couldn't get spokes in on the drive side because freewheel was in the way) to the rim. Then I placed the hub in a vice and turned the rim hard & fast to break the seal. Then spun it right off.

Boy....I won't do that again.