So wowhead.com put demon hunters into the dressing room on their site, essentially giving you a sneak peak at character creation. :-D
Here's the Night Elf I made....
And here is the Blood Elf I made....
I think the Night Elves look way better as Demon Hunters than the Blood Elves do, that's kind of disappointing for me, but maybe the look will grow on me and I can manage to play a Demon Hunter as Horde anyway.
I'm pretty excited about the class in general.