Phantom Hourglass wasn't ever given an official release date, which is why websites have all sorts of different dates on them. I believe the last 'official' word was that it would ship when it was ready, but not until then.
I've been a huge fan of the series since it came out, as well, and own pretty much every Zelda game in any format it's been released on. I even had 2 of the bonus discs that were offered for joining Nintendo Power back in 2005. Now that they're releasing the games on the Virtual Console for my Wii, guess who got suckered into buying them again
Anyways.. I'm hoping that it will be before Christmas. If they were going to release it that soon, I think we should have heard more about it during E3. I don't remember reading anything, though, so I'll have to look into it further.
I've heard the rumor mill saying that it will be a worldwide release, not a territorial one, so we'll see. If nothing else, I guess I get to learn Japanese by playing my first import.