As an addition to the earlier post - see below, I have not listened, yet, but based on the summary - should be interesting:
What's The Word? The Bible On Gay Marriage
December 15, 2008 · Religious leaders often cite scripture as the basis for their opposition to gay marriage. Albert Mohler, president of the Southern Baptist Theological Seminary and host of the Albert Mohler Program, believes a strict reading of the text forbids gay marriage. But Lisa Miller, religion editor at Newsweek, contends the Bible's models of marriage are flawed, and its lessons about love actually argue for gay marriage.
Here is the original link.