Do You Feel Fine?

Check out the WeFeelFine website: http://www.wefeelfine.org/

It trolls blogs and picks up statements in which people talk about their feelings, then displays and analyzes the results in several different aesthetically pleasing ways. Limit your searches by geographic area (US and beyond), date, gender, and more.

What a great tool for attempting to capture the emotional state of the blogging population at any one time. One shortfall is that it only trolls the English-language blogs.