A complementary movement is co-housing (http://www.cohousing.org/). Co-housing is about intentional community--a group of people get together and deliberately choose to live in smaller houses with a shared common space. This space might include a library, playroom, media center, kitchen / dining room (although each house has its own, and you aren't obligated to cook or eat with the community), or whatever else the community decides. Every co-housing group does something a bit different. One specific example is http://www.mosaic-commons.org/ (Full disclosure: I was involved in Mosaic for a couple of years until my divorce.)

It's a pretty cool concept and tends to attract the kind of people that hackers like (smart, interesting, iconoclastic).