The Federal Trade Commission just released a 4-page brochure for consumers titled "Selling Your Home? Tips for Selecting a Real Estate Professional". You can download the brochure here.

There is one error in it that I found though. On the first page where it defines a real estate broker...

Someone with a Brokers license can work under the license of an owner of a Brokerage. In this scenario, it doesn't matter if it's a Broker or an Agent, they both share a portion of their commission to the Broker-Owner.