Google Dictionary contains lots of useful information about English words and expressions. Besides showing synonyms, antonyms, definitions from the dictionary and from the web, related phrases, Google Dictionary added usage examples from Google News. Google extracts the quotes from news articles and attributes the quotes to their authors. You can find quotes in Google News if you search for name of a popular person and click on "Quotes" section (e.g.: Gordon Brown, Steve Jobs). Unfortunately, you can't restrict Google News results to quotes.