A fella called Scott Sigler has released several of his novels as audio podcasts, 1 chapter per week. The result is that his print versions have earned much more exposure and thereby sales. Its certainly a viable idea and doesn't cost anything, compared to getting a book printed first.
Keith, can you do any character voices or impersonate your father?
Check him out at
www.scottsigler.net. His podcast novels are called "Earthcore" and "Ancestor". Its sci-fi/horror, if you're into that sorta thing. Search on iTunes.