You'll make a lot of friends in the Voice Acting Community if,
you have the people do the voice acting for the mod, when the mod is finished.
I've been burned too many times doing voice parts, only to have the mod given up on, because
the modder couldn't get a script to work right, or the modder just lost interest in the mod,
or the mod was just too much for the modder to handle.
There's nothing more frustrating than putting aside a hours (even a few days) of recording lines
over and over again, editing them to remove noise and converting them to the correct format
only to find out the modder has disappeared or quit.
While I agree that most large quest mods that require voice acting are abandoned, let me say a few things to put you at ease. First, I want to do this for a living (I'm 16 right now) after college so I am sure as hell serious about it. That drives me to go to lengths few other modders would go. Second, I just finished a mod (my first mod ever) that took 11 months of work and over 600 hrs to complete. Let that be a testament to my dedication. I do not plan on dropping any mods I start. If I quit a mod, it will be a few days into writing it, not halfway through making it. Writing it is the hard part, and once I get done with that, unless my house explodes or something, its gurentee'd I will finish the mod.
Anywho, I went ahead with the mod I was planning on cancelling, as I worked out the issues with the script (just like you said

) and I made a thread on the VAA boards. Take a look and let me know if anyone is interested. I have finished writing the mod. All thats left is a few hours of work to actually set it up, then some light testing and other than the actual voice acting it will be completely done.
http://voiceactingalliance.com/board/showthread.php?t=61801