I'm leaning back over towards Luke & Leia as twins. As I'm planning the way the plot will go over the six episodes I just can't shake the feeling that there is a great potency in forcing Padme to choose between the two twins when they go into hiding. Combine that with being able to re-write ANH, ESB and ROTJ to accommodate the fact that they're related from the beginning and it should work well. I just like that story.