"Google has come come up with a novel way to boost the information it has about local businesses. As part of its Business Referral Representative program, Google is offering individuals up to $10 to visit local businesses and tell them about Google Maps and Google AdWords, collect information (such as hours of operation and types of payment accepted), and take digital photos of the business. Reaction to the program has been mixed."

You can find out more about Google's program here:

http://www.google.com/services/local-business-referrals/repfaq.html