Originally Posted by JonathanGennick

I couldn't do mittens very easily. My winter bike doesn't have thumbshifters. I need a finger for shifting.

You might give a look to cross-country ski gloves. I just picked up a pair Rossignol XC gloves the other day. They are thin and have a grippy palm and fingers. They have a layer of thinsulate insulation for the back of the hand. The palm is either not insulated, or it has a much thinner layer. For the short, one to two mile trips that I do around town, I'm pretty sure those will take me down to at least the teens. I'm looking forward to testing that theory.