Wizards of the Coast has announced that the 2008 Star Wars Miniatures championship will be held at this year's PAX. The tournament is open to all comers, but you have, well, today to preregister for PAX before that option closes (otherwise, you're stuck paying at the door).
You can read the announcement here. It's 150-point Constructed format...and I'm not a competitive player, so I have no idea what the latest tech and best builds are for Star Wars Minis these days. I recommend checking out the Star Wars Minis forums and swShoebox.com for proper format research.