I've been asked by folks in the congregation and without, for solid resources rejoining Newsweek's travesty of an article that purports to make a biblical case for "gay marriage" (but only after explaining that it's stupid to appeal to the Bible to defend one's view of marriage!). Well, here are a few.
Robert Gagnon, of Pittsburgh Seminary, who is an acknowledged and published expert in this whole area, has written a devastating rejoinder, here.
Christianity Today (online) has responded too: here.
Al Mohler weighs in here.
Mollie Hemingway of GetReligion.org drops an atom bomb here.
JT links to some good Tom Schreiner sermons on the subject, here.
Or search the CBMW site, starting here.