Liv Tyler (Arwen) was on Late Night with Conan Obrian and she mentions quite alot about LOTR. And thanks to Conan (who you should ALL love anyway) manages to get Liv to SPEAK some elvish!
She also goes on the say, in english, what it was a very good idea to shoot all three films concurrently, that it keeps everyone in character.
Thanks to Barbershop, we have a transcript of the interview. [More]