Facebook’s Gross National Happiness Index (http://apps.facebook.com/usa_gnh/) now tracks the nation’s happiness. By tracking the usage of words with both positive and negative connotations in our status updates, Facebook gets a sense of our state of mind.
I suppose we can track just about anything these days. How long it will take before people start using these sorts of methods for rating company satisfaction or reviews. It could be like the real time Rotten Tomatoes movie review site or a thermometer/customer satisfaction rating for Dell.