His name is Matthew Wood, I believe. And yes, he did the Chad Vader stuff. He was Vader in The Force Unleashed series most notably.
He's alright. No James Earl Jones. I can always tell when it's Wood. He has some... quality to his voice, like it's a little more from the top of the throat than the bottom. It irks me, but whatever. It's nice to see that Lucas isn't above hiring people who are just fans purely because they're fans.