In 2008, Dale B Martin (author of Sex and the Single Savior) delivered the John E Boswell lecture at the Centre for Lesbian and Gay Studies at the Pacific School of Religion.
Watch, listen and reflect.
The Pacific School of Religion Centre for Lesbian and Gay Studies is a great resource for a wide range of materials on faith and sexuality. QTC contributor Chris Morley has helpfully listed a summary of these in the comment thread, which I have now reproduced below.
See here, for a PDF file for the full text of White’s lecture.