There has been a lot of work with digital voice technology. Yes, a computer could read your ebook. Amazon got in all kinds of trouble for having this technology. The problem is, if you produce an ebook you have different rights to it than a printed book. Anyway, you could look into having a computer read your book. There are lots of programs and even "human" sounding voices that can do it. Be aware though there are more rights issues here. If you have a computer read your text, you have to get the okay from the software company.
Here is a free software to try, but you can only get a couple voices without buying the full product. It would give you an idea of what I'm talking about. They are very very close to making this sound like a real human voice. You can change the speed, pick male or female. http://www.screenreader.net/
A better, less hassle, and much cheaper way to go might be students. If you have a university around you, post a bulletin in the drama building. You could probably get a student who is "serious" about acting to do it for beer (or beer money) and the blurb on their resume. Experience in acting is hard to come by, and an audiobook counts as "voice over" work. Great for a resume. Just some ideas.