There are threads like this in a couple other Star Wars RPG forums that have lead to great discussions. It's a topic that has been touched on in various threads here, so I thought I would start its own devoted thread here too...
George Lucas himself has been quoted stating that there is a Star Wars multiverse:
George Lucas' Film Universe. The film saga. In this universe Lucas includes the dialogue and events of the film novelizations, comic book adaptations and radio drama adaptations that do not contradict the films. The more recent versions of events (currently the DVDs) overrides t