Google News can now detect quotes in news articles and attribute them to their authors. If you search for people like Eric Schmidt, Pope Benedict XVI, President Bush, Angela Merkel or Fernando Alonso, Google News will display a relevant quote and a link to other quotes from recent news articles.
You can search inside the quotes, sort them by date, restrict them to the last day or the last week. Unfortunately the links to quote listings aren't very descriptive (here's one example) and there's no option to find the quotes related to a news cluster. By default, Google sorts the quotes by relevance and gives more weight to the quotes that are used often.