Game Informer's Mass Effect 3 page has a ton of goodies on it, the best being 7 video interviews (that all together clock in at just under an hour). They cover everything from the origin of the game, to voice work and sound design, to character design, and how much attention that pay to feedback from the first two games.
You'd be doing yourself a disservice if you are a ME fan and don't check it out.
Game Informer: Mass Effect 3