Here’s an excellent infographic on customer reviews and how they affect your visibility in Google Places, how reviews help you attract more customers, etc.
Take a second to look it over: you’ll probably see ways to get more and better reviews (resulting in more local visibility for your business and more customers, of course).
It was made by the local search specialists at 540SEO.com (thanks to Keith from 540SEO for passing this along).
It’s a great application of some of my data on customer reviews plus excellent info from Mike Blumenthal, David Mihm, and other really knowledgeable people. Enjoy!