I have to echo both Red and NYC, Read a few of the blogs, or just browse the forum. That will give you a definite idea of what you need to know.
As for "Poly Families" you need to define that more, or like I said read the forum and then maybe try and ask for a particular segment's input; because poly comes in many forms....oh wait maybe I just answered your question partially.
Polyamory is wrong! It's Multiamory or Polyphilia. Mixing Greek and Latin roots? That's wrong.