Wow, someone sent me a link to www.icebike.com - made me feel a bit better about biking in the cold mornings in the Bay Area. These guys are crazy. One thing they suggested which I think will make a huge difference is cycling gloves. Anyone else bike around in this cold weather? Any tips?
You won't see me out there at dawn, but REI sells some very thin but very warm fleeces. I have a microfleece from them that takes up almost no space in my tankbag, but has kept me more than toasty on many an evening Bay crossing. They are pricey, and mine picks up lint like crazy, but the warmth per unit weight can't be beat.