We now know that the Volturi will have a symbol of their own, as well–Cameron Bright, who plays Alec, says–

Your wardrobe, that pendant you’re wearing—do you know what those symbols are?

I don’t know, they just kind of slapped it on me. I know that’s a “V” for Volturi, I’m guessing? Because I’m a Volturi…I really have no idea what you’re asking. [Laughs.]

Does yours match Daniel’s?

The whole Volturi family has it because that’s their family seal. I don’t really know all of it.

The symbols were no doubt added to the movie in order to make branding of New Moon merchandise easier, as we’ve seen from the numerous pieces of merchandise with the Cullen Family Crest.

Read the rest of the interview at MSN where Cameron reveals some more details on the movie, including the deets on a fight scene, working with Dakota Fanning and his special powers.

UPDATE: First picture of the official Volturi symbol here!

[thanks LMCullen, Sparks!]