As I was telling you, last week I traded my vented bike gloves
for my trusty leather gloves with fleece inside plus latex gloves
worn on the inside as insulation, it worked, big difference!
it's all about layers and keeping the wind out.
Today I got in the mail a pair of Burton Snowboarding gloves I found
on sale for 19 euros that are supposed to be wind and waterproof and
guaranteed to keep your hands warm at down to -20C (-4f), excluding
windshield factor of course.
They are flexible enough to operate all controls, including turn signals
and have a tough kevlar-like palm finish designed for sharp, icy falls
so they should be fine for biking. I got'em in black.
I'll will keep you updated on their performance after I try them a
couple of times this week on my way back from work @ around 0C (32f).