Hi, first post so bear with me ok?
About the discussion concerning obi-wan not knowing of Leia's existence. Maybe Yoda decided that was an information like on a "need to know basis" and you don't kneed to know. After the fall of Anakin, Yoda entrusts the son to Obi-Wan and the daughter to Bail in Alderaan. The middle-man seems to be Chewbacca, but I麓m really curious about hoew that falls in to place. Seems to me like old Lucas just wanted to put that caracter in this series and came up with this idea.
And you are all forgeting something. Who erases the droids memory? I think that will be the last scene of the movie... Something in the likes of: A secret this must remain, destroyed all the records shall be; or something like that.....