After hearing the AWESOME monologue in the opening cinematic I checked the credits to see who wrote it. The credits list not only Tim Schafer as a writer, but also Erik from Old Man Murray. At least there's a reason that page hasn't been updated in forever. Either way, Tim Schafer's games always have fantastic writing, and not just "for a game", I mean fantastic writing period.
Raz's voice also sounded familiar. That was done by Richard Horvitz, same guy who voiced Invader Zim. There's some major talent all the way around on the game.