with my new high efficiency furnace, I had a new Honeywell Prestige thermostat installed. It gives me internet connectivity as well, and looks really great too.
Also, I only have two wires from the furnace to the thermostat, so anything else would have required a seperate control for the humidifier & fan, and extra wiring run. This Honeywell uses the two wires to communicate to a controller down in the furnace room, where you can connect more things. In the future, I can add air conditioning as well.
http://www.forwardthinking.honeywell...q_feature.html