Evan, if you survived last winter I'd be interested in an update on how those gloves worked for you.$12 Neoprene Glacier Gloves from Sierra Trading post.
They're 3mm neoprene that is fleece-lined for easy on-off and comfort. They also have thumb and index finger slits. Same idea as those wool fingerless gloves with floppy velcro-back mitten hoods.
This is my first winter biking and I haven't tried them yet. But I've been a mariner in the wet and cold for years. No matter how waterproof the glove, your wet hands will always soak them once you take them on and off. So I gave up on dry hands and settle for warm damp hands. Unlike other hot-when-wet materials like fleece and wool, neoprene doesn't soak up water and have a spongy feel.
Take it with a grain of salt though since this is my sailing solution and I haven't biked a winter. In a couple of weeks I'll get back to you with the results.
I've been riding the last month or so with Outdoor Research Meteor Mitts:
The best test so far has been a 45-minute commute in mean temperature of 5 degrees with a below-zero windchill. The outer mitts alone kept my hands toasty warm. If you add the liners, I'm not sure you'll ever get cold. The mitts have a big cuff to go over the sleeves of your jacket which eliminates any cold air sneaking in and freezing your wrists or forearms. The liners are convertible so the tips of the fingers/thumbs pull back easily so you can use your fingers on your phone or in your pocket, or whatever, w/o taking off the liners. Really I can't say enough good things about these. They work great for bike commuting.
These $40 gloves are super-warm and waterproof (Hipera inter-layer) and are made for motorcycle use. They are probably a lot warmer than needed on a bicycle unless it is zero degrees or below depending on how easily your hands get cold. Your hands definately will not get cold in them. Too hot maybe -but never too cold. The build quality is awesome for the price. Very good stitching and decent materials are used. Not nearly as bulky as a similar non-riding glove with equivalent warmth.
under armour extreme coldgear gloves. i wore these all last winter, and this far into this one. they aren't 100 percent waterproof but i only had to double up my gloves once or twice last winter. mine are about worn out and i am buying another pair.