All 3 hives died this winter - looks like they had broken cluster to feed and the cold got them. They had plenty of stores, just didn't make it. New bees will arrive in a couple of weeks, I'll hive them up and hope for the best this year.
On a different note, I attended a meeting of the Eastern Connecticut Beekeepers Association this past Sunday, where Michael Palmer of Vermont spoke about overwintering nucs, splitting hives to make nucs and queen rearing. If you ever have a chance to see Michael speak, do so. While you may or may not agree with everything that he says and does, he is a terrific source of information (and a really nice guy).
I'm hoping to split a hive with one of his Northern queens this year if they build up enough.