Okay, we have scripts. I've put out feelers for some voice talent, but if you know of anyone with a radio-friendly voice (and preferably experience, but you can't have everything) who'd be willing to help, let me know.
Complete trilogy commitment is needed, I want to avoid mix-and-match voices if I can help it. The scripts contain pronunciation cues for some of the more obscure Star Wars names (Rieekan, Ozzel, etc), so they don't even have to be a big Star Wars fan to do it, although I'm sure it wouldn't hurt.