SEOBOOK has an interesting post on a Artistic Program called "We Feel Fine" .

"My friend Joel recently mentioned a cool project called We Feel Fine, which tracks human emotions expressed in blog posts. After his most recent commercial shoot I think Joel feels sore (but his post is funny). I am sure the methodology to We Feel Fine could be a bit more advanced, but what a cool idea, eh?

It's a fun program to play with and I tried to see if I could find out about feelings in NYC. 

You can play with a lot of stuff here - but it's more for entertainment than anything else.     According to the program people in Mississippi, New Jersey, South Dakota and Maine between 40-49 years of age are the happiest (based on extracting blog posts on Technorati, etc).

Like I say, great way to pass some time looking at the World's Feelings.