I would reply in a PM as prompted by the OP, except as a new member apparently I can't send PMs yet (which is a fair anti-spam rule).
I haven't even created an account in game yet. I plan on first getting as much detail about the game world so I can best plan out my character first.
However, I would be willing to do some voice work. I used to do community theater, and I've LARPed for years. I love to act. I don't know much about tweaking the audio files I would in turn record, but I do have a headset mic. I currently only use it for Skype, and haven't tried recording with it before, but I can try recording some samples and sending them in.