Agree w/SK. The Lobster AmFib works for awhile below freezing. However, I have to "team" them w/smartwool glove liners & therma-lux glove liners w/a chemical hand warmer in the latter's "pocket." Inevitably, my thumbs get cold after a time. Wiggling them helps somewhat. If they start to hurt, it's time to surrender and head home.

Last year, I read that someone was developing a cycling glove w/a rechargeable heating unit (along the lines of Sidi toasters for the tootsies). I think they were coming out in '09.