Acting Auditions Blogspot has some new info about the auditions for Eclipse and some facts about the New Moon Filming. They also mention that filming for Breaking Dawn will begin in 2010.
Summit Entertainment has started pre-production and casting for the sequel to Twilight, New Moon, based on Stephenie Meyer's second book in the series, and to contain costs, the studio may be filming the third book, Eclipse, back to back using the same new director (this has not been confirmed). On Sunday, December 7th, Summit Entertainment did confirm that Catherine Hardwicke will not direct the films New Moon or Eclipse, and Chris Weitz has signed on to replace her. Filming begins on New Moon in March, 2009. Auditions and any open casting calls for Eclipse will be posted here.
click the link below for more info: