Homosexual Debate Should be Based on Philosophy and not the Bible??

Tony Jones, from the emerging church movement has asked for critics to bring an argument against homosexual activity to the table without the use of scripture.

In a recent blog post he says:

"If you are one who thinks that homosexual sex is sinful, can you please explain to me WHY a gay or lesbian person who is in a long-term, monogamous relationship would not be able to wholeheartedly follow Christ?

My only stipulation is this: You may not quote one of the six verses in scripture that mentions homosexuality. Instead, you must use theological and/or philosophical arguments to attempt to convince me that when you have genital contact with someone of your own gender, it somehow inhibits your relationship with Christ."

Here is some interesting discussion on it:

http://crninfo.wordpress.com/2009/08/05/an-honest-question-about-gays-in-the-church-response-to-tony-jones/#comments

By the way -- To give brother Brian McGraw a shout out -- how do you have a theological argument without the use of scripture?