Rabbi Chaim Rapoport is generally considered to be the preeminent Orthodox expert on the interface of halakha and homosexuality.
Torah In Motion recently gave away Rabbi Rapoport's TIM lecture on the subject (perhaps because the audio quality is not perfect).
Because of the shooting last night in Tel Aviv, I'm posting the lectures here.
Listening notes: There is a long gap at the end of part 1, perhaps 2 or 3 minutes. There is also a 22 minute (!) gap at the end of part 3. (Why TIM didn't edit these mp3s is beyond me. Normally the production of their products is much more professional.)
Listening involves a commitment of approximately 2 hours (not couting the gaps).
I suggest that anyone who feels bound by halakha make that investment before venturing an opinion on homosexuality, especially in a climate where those opinions can incite murder.