I finally watched the documentarythe CBC aired a little while ago on polyamory. Make by a UK crew, and using two US poly families, I think they did a decent job, considering that they only had an hour. They focussed mostly on heterosexual, long-term committed relationships, and glossed over a lot - but they only had an hour. Neither of the two families they shadowed quite matched what I usually see among poly folk I know, though the first was pretty close. The second family was.. well, a "dominant" man with a wife, and two live-in girlfriends, one of whom was clearly not poly by nature, but lived there anyway.
As presented, a poly life really doesn't seem like it is worth the trouble at the best of times, and the second family gave me the wiggins a few times. The film left out any sense of a polyamorous community - both examples of new people being brought into the relationships are of monoamorous people being uncomfortable with the situation.