It's an awesome day for the internet!
The werewolves are challenging Edward Cullen to a shirt-off. So far, the wolves are winning.
But seriously? Are they just going to have every production photo be of guys without shirts on? Of course, that does sound like a good marketing scheme. And I'm glad that it's not another half-naked chick. (Seriously, Vanity Fair?)
Also, I guess this actually figures into the novel--the werewolf part, not the Edward part. They get overheated and can't really transform with their clothes, so the idea is that they end up shirtless a lot. But add Edward to that, and it's just marketing.
One thing I do like: the actors--Chaske Spencer, Alex Meraz, Kiowa Gordon and Bronson Pelletier--all have Native American heritage. That's not to say you can't have an actor play across cultures, but I'm pretty sure Native American actors aren't offered a lot of roles.