Most mainstream brand, cycling-specific gloves don't use wool, and you can get a few pairs that will work down to pretty chilly. Unfortunately, I don't know of any good cross-brand temperature rating.

For me, PI lobsters go down to 14F (the coldest I've commuted in), and are too warm above 25F. Nashbar lobsters work from 20-30F, and Performance Century are good for 30-50F (when new). A pair of REI Novara is OK from 30-40F, but it's heck to get them on and off. Most of my other experiments aren't warm enough below 40F or so.