I have these also. They work great on my road bike. I wear "regular" bike gloves underneath. Kept my fingers toasty on a 3 hour, 38F ride with gusts over 35mph.

Handlebar mitts/pogies. Worth a couple of glove ratings all on their own. Definitely allow lighter/more flexible gloves without penalty. I use the MEC ones, but they need to be modified with brake cable inner fed through the opening seam, and cinched up to provide some stiffness to the openings.

Huge, huge difference. there are even some out there for drop bars.

As an added bonus, they provide some extra protection to the cable entries at the bar controls.

Walls makes a freezer-worker glove that works really well. Good long gauntlet on them with Velcro closure, heavy Cordura construction with leather palm, and totally reasonably priced, I think I paid $22 for mine three years ago. Plus if I ever need to do some emergency falconry, I'm prepared.

I just picked up a couple pair of deerskin-palmed, waterproof-membrane (off-brand Gore-Tex analogue) gloves at Gander Mountain for half off, like $17.50 apiece. We shall see how they work in just a few days.

Ski gloves and when it gets really cold climbing mitts over them - These are VERY expensive but will last forever (kevlar)

ah I just saw mine are an older model without the wool inner mitt...

location: sweden, regularly down to -20 C

These are ATV Logic bar mitts from Amazon.com, $17.99. We're about to take a serious temperature plunge here in eastern Washington, so I've just dug these out of the closet and installed them. The main thing is that they shield your hands from wind chill and precipitation (obviously) and also shelter your wrists.

I like a Thinsolite leather glove with a wool liner if it getting down towards freezing.If it's really really cold,mits on top of that.

I like wool liners with removable wind-block outer layer(I have gortex). Whatever you decide make sure the gloves are not tight. This will slow the blood which causes you hands to get cold. This is often the cause of cold hands and cold feet.

I am, as I type this, wearing my Decente Element gloves (mine are last year's model). -20ºC (-4ºF) today, and I wore them to work, no problem. My building heat is still having issues, so I've been wearing them off and on at my desk. They're agile enough that I can slowly finger-type with them on. I think if my ride was more than 20-25 minutes, I might want something thicker, but for my purposes, they work great. My finger do sometimes feel cold - the lobster version might be better for this - but they're good enough that's just a slight discomfort. Not anywhere remotely close to a frostbite risk.

They've even got a nice bit of terry-cloth for wiping my snot. How thoughtful is that.

I'm in love with the (expensive) Pearl Izumi lobster mitts I got for Christmas last year. I have terrible problems with cold fingers and toes - I sometimes wear glove liners at the office - and yet I have never been cold in the lobster mitts and have never needed chemical warmers. they are a wonder!

Recently picked up a couple pair of the Descente Wombat glove on bonktown.com ($19.99). The mitten that folds out from the back of the glove is worth 10 degrees F, and for temps into the single digits, my sis makes these corn bags that you can nuke for 30 seconds and they stay warm for half an hour. I tuck the bags into the mitten, then over the fingers. The wombat glove is a little thin on thumb insulation - makes me wonder who engineers these things, so to remedy that issue, I simply cut a bit off of a plastic grocery bag and insert between my poly glove liner and the glove.

If your hands are freezing, the ride is ruined.

EDIT: For those who say inexpensive (less than $10) gloves, please indicate your temperature threshold. Thinsulate comes in different ratings (I have 80g for down to 30 degrees F), and a $3.99 glove will not help anyone at 15 degrees F.

I just bought a pair of waterproof gloves lined with Thinsulate for $3.99 at Fred's. They seem like they'll be fine and I can't beat that price anywhere.

I actually prefer using a separate glove liner to keep my hands warm.

like this.

Yes, this is good. I use the polypro gloves from Nashbar/Performance ($4.99 on sale). I tried the fleece liners, but they did not insulate or wick as well.

Where do you live? What works in Palm Springs may not be adequate for Minneapolis.

I use the same Wombat gloves as RTDub. I also keep a few hand warmers in my bag, just in case.

Here's a little lesson it took me years to finally figure out:
Buy gloves about a size larger than you think you need.
Tight gloves restrict blood flow, thus reducing your body's ability to warm your hands.
Also, this allows you to put a silk, nylon or thin wool liner on under it, if needed.