Chances are you weren't at Comic-Con and didn't get to see the 5-10 minutes of Iron Man footage that threw all the geeks into a frenzy (and even got us slightly less crazy people a little bit excited).
The footage was leaked somewhere, but it was crappy grainy footage that nobody cared about. Luckily now the official teaser trailer is up over at apple.com, and it basically consists of the same footage, cut down in length a bit, and some new shots as well. You can check it out in high-res glory here. And if you can't get enough, below is some footage I found of the Comic-Con panel with director Jon Favreau and his stars:
