I can now say that I have ridden every day in 2009! It has warmed up to -13C today, but with the wind it apparently feels like -20C, with the wind at 14 km/h. Two circuits of my street gave me 1.2 kms of overall distance, taking 5.3 minutes. I managed to reach a maximum speed of 18 km/h on a dry patch.
Nowhere to go but up from here!