Building a "Wired Home"

If all goes well, this summer I'll be building a new house. I've owned a few houses before, some of them built in the 1920s and 30s, and full of all the charm and quirks of an old house, and a couple that were pretty new, with the lack of craftsmanship and imagination that's typical in most new construction in the USA today. But this time I'm building a custom home, just to my specifications, so I can have whatever features I want, limited only by my imagination (and budget). I'd like to integrate some home automation features into the house, and include wiring for future expansion.