Hi Brad! You may remember me from the old days on c.o.o.* on usenet 
My father's house uses geothermal to heat and cool. It works quite well for him. To be sure, it's expensive to set up, but if you are able to have a well, you can have geothermal.
You have enough acreage to make a windmill another real possibility. Up here in southeastern Ontario, they are popping up all over the place... and aren't without their controversy; this is the tech most likely to piss off your neighbours.
I think solar panels are still looking a little expensive, but as more people buy them they should become cheaper... though I understand that there are some very rare elements used in their construction that might create long term issues for the technology. Also, consider passive solar... the idea is to use the sun to help with both heating and cooling of the house but not by generating electricity; this is more expensive than just building a house, and requires you to look at where the house is in relation with where the sun crosses the sky, but it can work quite well too... one of my neighbours bought a few of those "heat your pool" things and put them on his roof, but instead he uses the water to heat his house in the wintertime.
Consider building a straw bale house; they are extremely good at remaining at a comfortable temperature. Of course, if you live in a place with hurricanes and tornadoes, that might not be the best possible option, but otherwise everything I hear from people around here who have them (mostly on Wolfe Island) love them... good ventilation and very good insulation.