In reply to girlymonkey:
I'm a big fan of the over-mitt idea but have never found an ideal version. Gloves that are too tightly woven and/or have leather/synthetic palms don't breathe well enough I find, and some over-mitts don't cover enough to keep really warm, often just the fingers (have tried OR, Salomon and TNF). Result is cold hands from several factors.
The best solution I've come up with is a Salomon over-mitt over a pair of grid-pattern base gloves from Nike or TNF, covers all the options from a very breathable glove to fully windproofed.
For fingerless, I'd just chop some gloves you like, then some stitches, glue or sports tape to stop fraying. Do you need all fingers bare or just index and thumb?