New Anthony Daniels interview with ET.

Short excerpt regarding Episode VII and CGI C3PO in the PT:

I will tell you that when [director] J.J. Abrams rang me to ask about filming Episode VII, one of the first things he said after he told me how wonderful I was — and that didn’t take long — but he then said, “Would you be interested in being in the film just doing the voice?” I said, “No,” and he said, “Right!” He knew I’d say that. There’s no way I would just do the voice. I also said that it can’t be the same suit. I will tell you that the team then got together and built a new suit. They made an entirely new look-a-like with changes that you will never notice [on screen] that made my life a lot easier. I can get it on and off very quickly. [During the prequels], the only time [Threepio has] been CG was when it was very dangerous [to act in the scene in a suit] — and it wasn’t very good. In fact, I’m going to say it was awful. One of the difficulties is with a character that you know and love so well is that, as a member of the audience, you go, “Oh no, that’s not right. No, he doesn’t move like that.” With me [in the suit], he’s always going to move the same way and have the same reactions, timing, and so on. With CG, you’re working with some brilliant person on the keyboard who is trying to pretend to be me.