Unfortunately with fundies who can't think for themselves, they wouldn't even believe God himself, if he appeared to them, so I just don't really have anything to do with them. Perhaps some day they'll wake up to the fact that they're missing God's joy in loving.
Unfortunately...I'm afraid this link wouldn't help me at all with my (converted fundie) sister...as the site doesn't condone polyandry ("A woman having multiple men is an offence to God. Intimacy is marriage and a woman with multiple men has multiple husbands and out of line with God's Word. Men sleeping with the same woman are committing fornication.") and condemns polyamory outright ("Despite their protests to the contrary, polyamory or many loves is fornication. Sex is not to be used and abused with such godless liberalities." and "Polyamory is a wicked deception. Many loves or lovers based loosely on the concept that we are to love each other as Christ commanded is Bible abuse not adherence."...doh)
My view is that (as a former pastor) polyandry is just as valid as polygamy, since society no longer places women as property of men who need protection, and that even the new testament teaches that we are equal.