Whatever your feelings about homosexuality, Luke Timothy Johnson's candor should be welcomed and encouraged:
I think it important to state clearly that we do, in fact, reject the straightforward commands of Scripture, and appeal instead to another authority when we declare that same-sex unions can be holy and good. And what exactly is that authority? We appeal explicitly to the weight of our own experience and the experience thousands of others have witnessed to, which tells us that to claim our own sexual orientation is in fact to accept the way in which God has created us. By so doing, we explicitly reject as well the premises of the scriptural statements condemning homosexuality—namely, that it is a vice freely chosen, a symptom of human corruption, and disobedience to God’s created order...
By “experience” we do not mean every idiosyncratic or impulsive expression of human desire. We refer rather to those profound stories of bondage and freedom, longing and love, shared by thousands of persons over many centuries and across many cultures, that help define them as human. The church cannot say “yes” to what the New Testament calls porneia (“sexual immorality”); but the church must say yes to the witness of lives that build the holiness of the church.
Don't miss Eve Tushnet's followup essay either, where she points out the flaws in Johnson's attempt to valorize our own experience of the world.