I've often wondered if the authors of the Bible intended it to be read as literally as many people read it today. Leviticus, for example, is a collection of moral codes, and many of them conflict with each other. They serve to illustrate many worthwhile moral principles, but I don't think they were meant to be followed word-for-word. After all, the Jewish tradition was one of discussion and disagreement, not one or rigid law. It does seem that literalistic legalism was alive and well at the time of Jesus, but it seems that literalism develops as time goes on and context is forgotten.

If you look at the Hebrew Scriptures and the New Testament as a whole, you'll see that very little is said about homosexuality. Therefore, I would guess that it must not have been a very important issue at the time the scriptures were written. Compare the dietary laws with the coverage of sex in the bible, any you'll get the distinct impression that the scripture writers really didn't care to try to regulate sex to any extent.

-Joe-