There's a page on IMDB.com that references taglines for the upcoming New Moon movie based on the book by Stephenie Meyer.
I can't imagine that these are official, but I'll list there here for you (just in case):
It will be as though I never existed.
Forbidden to Remember; Terrified to Forget.
Somewhere, a clock is ticking.
When you can't be with the one you love, will you stay with the one who loves you?
Love Bites Back
The Cullens are not the only family with a secret....