Wil Wheaton, he of Stand By Me and Star Trek: The Next Generation fame, is also a voice actor, writer, and self-published author. You can read an interview with him over at Lulu.com about his most recent self-publishing venture.
I have mentioned here in the past that I am not a big fan of Lulu because their pricing model doesn't work well for most of us. Clearly, Wheaton feels differently.
It has been a while since I have looked at their website. Worth it to take another look (but hard to imagine that it is a better option than Lightning Source).