That irritating Microsoft paper clip develops a conscience. Still, if I had to pick between Karl Rove and Clippy, I'd still pick Rove. Rove may be evil. But he doesn't bug the crap out of me when I'm writing, as Clippy used to. (Yeah, I now use BareBonesEdit for everything.)
A treehouse can be an ideal office space, vacation rental, and way of reconnecting with your youth.