For those of you who haven't yet found Richard Beck's "Experimental Theology" blog, his latest post is a good place to get acquainted.
He suggests that a hypothetical church, struggling with the issue of gay marriage, might commission those of its members who are passionate about the issue to found a daughter church in which gay unions are treated identically with heterosexual unions. This would be taking a great risk and they could be making a mistake. But they are acting out of love and out of a passionate belief that this is what God wants them to do.
He then suggests what God might say to them about it when they finally face him and are called to account for what they did. It's thoughtful and thought-provoking. Check it out.