Great article from Search Engine Land discussing reviews and business credibility.
It's well worth a read, but basically it's talking about the reality that most consumers these days are swayed by reviews, and its up to businesses to put out a credible and positive reputation.
Most of the tools are out there for a business to it themselves, and are free, such as a Google listing with reviews, Facebook page, directory review sites etc. But it does paint an interesting picture and give an example of how you determine when a business or idea is deemed credible.
Online Reviews, Reputation And How To Become Super Credible
Do you follow the online review and testimonial approach with your business, or disagree and prefer other marketing approaches? May be you are a word of mouth business, which is the original testimonial model.