C3PX said:
But that is all just meaningless EU stuff, isn't it? That stuff gets over written all the time.

Just because it isn't set in stone doesn't mean it holds no weight. Yes, if GL saw fit, he could erase all of it. But he hasn't, now has he? And until he does, it is "truth" as far as we're concerned. This very site was created because the movies themselves were changed. How does the fact that the information in the books can change make them any less valid? I can understand if there was a company-wide decree that only the movies were canon, a la Star Trek (where all published material is non-canon, with only two possible exceptions), but the official company-wide policy is that everything that can reasonably fit is canon. Granted, GL's personal view is that Star Wars doesn't exist outside of the movies, which is why he can ignore all this stuff and get away with it, but ultimately, he's going to die a lot sooner than his company, so it's obvious which view will win out in the end.