I'm maybe looking at this from the worng angle. As far as I'm concerned marriage is about friendship and partnership with someone you love, you can have kids or not but you and your partner are making a life commitment to each other. My kids will eventually sod off and do their own thing but the memsahib and I will hopefully stick it out till "insert your favourite deity here" makes the call.
Now that commitment need to be recognised in law to allow same sex couples to be treated the same in terms of the laws of the land, so yes the legistlative parts need resolution. The religion part is a whole new ball of chalk. In arguing against one of the fundamental tenets of christianity (there are other forms of worship which I know sod all about ) to be "equal" seems wrong to me, God created Adam and Eve, not Adam and Steve or Ruth and Esther to keep the ecclisiastical theme going.
The church has enough problems existing in modern society down the path they have decided might make things a whole lot worse.