Haven't been able to find it on YouTube yet, so for the time being you'll have to watch it in Quicktime format. Which may be for the best anyway, since Quicktime is much more high-res.
Avatar certainly looks good. So far as what the story is supposed to be about, I'm not quite jazzed about it. Yet, anyway. But hey, I've been pleasantly surprised about a movie before, maybe this one will too.
Avatar opens this coming December 18th.