Better Business Bureau of the United States and Canda
Offers consumers and businesses resources including business and charity reviews, complaints, statistics, ratings, and more to assist in intelligent buying decisions and investment opportunities.
http://www.bbb.org/

Consumer World
Features over 2000 links to everything 'consumer' on the Internet, including product reviews, buying advice, consumer rights, scam alerts and bargains.
http://www.consumerworld.org/