David Myers' own reflections:

• What God Has Joined Together: The Christian Case for Gay Marriage.  Myers, D. G., Scanzoni, L. D.  HarperSanFrancisco, 2005. 
• A condensed chapter from the above book ("Changing Sexual Orientation?").  Published in Perspectives (2005, May).
• Brief essay in reply to a critique of above chapter (Perspectives, 2005, September).  Robert Gagnon's extended (58,000 word) critical review, and David's response.
• A textbook summary of the emerging scientific understanding of sexual orientation from Myers, D. G. (2007), Psychology, 8th edition. New York: Worth Publishers.
• For a briefer synopsis of research, plus David's response to it for the faith community, see: "Accepting What Cannot be Changed." Published in Perspectives (1999, June/July), pp. 5-7.  (Note:  The 2005 book extends and updates this.) 
• Op-ed essay offers a pro-marriage case for contesting constitutional amendments against gay marriage.

From The American Psychological Association:

• "Answers to Your Questions About Sexual Orientation and Homosexuality."
• Briefing sheet on same-sex families and relationships.
• 2004 "Resolution on Sexual Orientation and Marriage," and "Resolution on Sexual Orientation, Parents, and Children."
• Amicus Brief for New Jersey court case (October, 2004).

For the contrasting views of others within the faith community, visit, on the one hand...

• Evangelicals Concerned
• Mel White's Justice Net
• Is the Homosexual My Neighbor?, by Letha Dawson Scanzoni and Virginia Ramey Mollenkott 
• Homosexuality and the Christian Faith, Walter Wink, editor

And on the other...

• Family Research Council
• Focus on the Family
• Exodus
• Homosexuality: The Use of Scientific Research in the Church's Moral Debate, by Stanton L. Jones and Mark A. Yarhouse

For "a demilitarized zone in the culture war"...

• Bridges Across the Divide
• BBC synopsis of arguments for and against gay marriage
• From Australia