I'm commuting with Nashbar's commuter sandals which i love but my toes have been freezing in the pacific northwest. I typically run a light weight wool sock with a bigger warmer wool over it. So far i haven't been caught in the rain too bad (i'm planning on buying water proof socks for this) but my toes get way too cold during the ride.

I'd hate to buy new shoes when warmer weather is only a few months away. Does anyone else commute with bike sandals during the winter?