Ok, so she's not entirely new, but she's fairly so. Anna at Open Fidelity has a lot of interesting things to say about non-monogamy. She does make a distinction between what she is terming open fidelity and polyamory. I suppose it's a similar distinction between, say, slipstream and magic realism. (That's my literary reference for the month; both of those are similar types of fiction - look them up; you'll learn something).