Re: I thought they said the JJ-comics were canon?
The Star Wars EU is directly based on the way Star Trek did it. See this comment from George Lucas:
I don't read that stuff. I haven't read any of the novels. I don't know anything about that world. That's a different world than my world. But I do try to keep it consistent. The way I do it now is they have a Star Wars Encyclopedia. So if I come up with a name or something else, I look it up and see if it has already been used. When I said [other people] could make their own Star Wars stories, we decided that, like Star Trek, we would have two universes: My universe and then this other one. They try to make their universe as consistent with mine as possible, but obviously they get enthusiastic and want to go off in other directions.
Star Trek Imponderables
, fun mashups of Trek's biggest continuity errors! Ep1