I'm always on the lookout for waterproof gloves that don't limit dexterity.  The best solution I've found so far are "Seal Skinz" gloves. There strength being that they are 100% waterproof, offer moderate insulation, and because they "fit like a glove" make it possible to do the smallest tasks around camp.  They have two limitations:  1.  BrThey don't breathe very well, so they can get stinky in hurry if you are excercising.  2.  Durability:  The neoprene wears easily.  Still, I prefer them over everything else I own and wear them as a base layer glove in winter to drive in, snowshoe in, cook around camp, setup the tent, change a tire, etc.

Outdoor Research has a new glove out that looks interesting, but I'm not sure it offers the dexterity they are claiming (at least when compared to the Seal Skinz).

Enforcer

The ultimate in impact and “wet” ice protection, the Enforcer is designed to take on the nastiest of conditions. The d30® padding hardens upon impact yet remains supple and flexible during use. Wetness is shut down with a 100% waterproof, breathable Gore-Tex® with XCR® Product Technology insert, and abrasion-resistant schoeller fabric provides a stellar grip. Insulated with PrimaLoft® and fleece, the Enforcer will keep your digits warm in temps that dip well south of freezing. Comes with removable liner. Imported.

Temperature range:
-17/-1° C (0/30° F)