Here is an assortment of houses, each different and all interesting.
Shiga Eco House project, ecohouse66 is something like what I would have liked to do.
Well insulated and solar powered, but also they did a lot of the building themselves, and were more careful using recycled and sustainable materials.And here's a house being made of straw.
Seems like a good material to use!
And then there is Tighthouse - a passive house in New York city. I think "tight" refers to the airtightness, not the reticence of the owner to open his wallet.