I have to agree with Bingo...the Naboo planet should have more significance to the plot, and like you said, can only be pointed out in the crawl. As Bingowings has already mentioned, there would be an abundance of worlds in the Galaxy for the taking...so why covet Naboo, anyway? Having read the books himself, I think Lucas was going for the Dune analogy here, but for some reason decided to downplay it, instead. I like the neighboring system or former world ideas myself, but the one glaring thing that stares you in the face (that nobody bothers to emphasize in their fanedits as important) is the plasma facility, itself. This little tidbit is mentioned in the Darth Plagueis novel and holds a lot of importance to the characters in the book. And it is the one thing that makes Naboo sort of unique, too. Instead of saying abundant resources in the crawl (which I'm sure a lot of worlds are, anyway), why not go with rich plasma resources, so it specifies why the planet is so special. Once you read the crawl and later see the plasma facilities that the Jedi fight in, you'll understand why the Neimoidians would want Naboo.