Just a Spring 08 update.
This past winter I intentionally left my worm bin outside, mostly full of worms. It was frozen solid from before Christmas until about two weeks ago. I went out in tonight's relatively warm weather to check on them. I had also put a shovel full of worms into my compost bin from the worm bin. Both bins are full of fat lively and feisty worms.
I don't know how the worms do it. Whenever I've accidentally frozen a carton of commercial worms, they turn to a smelly soupy mess when thawed.
Oh well, I was just happy to see them eating my garbage.