While I'm not in charge of voices, from what I understand there are so many different capital ships, transports, and minor pilots it wouldn't hurt to have a whole lot of different voices: male, female, various ethnic groups and accents, you name it and it could probably be used on at least one occasion.
The voice acting has the potential to really put the brakes on this project. So, if you want to lend a voice and are dedicated to getting any lines given to you done ASAP, then send something in. Personally, I'd rather have a fair/good voice actor who gets things done in a timely manner than a fantastic voice actor who dissapears and takes forever to get things done.
If we need more voice actors, talk to your friends. They don't even need to know what WC is. If you just tell people that their voice could be in a video game, you'll be surprised how many people are intrested, even people who don't play games at all!
Tolwyn will give the final word, but no one should be shy about sending stuff in, especially if you are going to be dedicated and help us turn this out. The sooner the voice acting is done, the sooner we all get to play.