"We feel fine!" explors human emotions on the Web. If you have written in your LiveJournal, MSN Spaces, MySpace, Blogger, Flickr, Technorati, Feedster, Ice Rocket, etc. what you feel or what you are feeling in this moment, your feeling could also be crawled by "We feel fine!"
15000-20000 new feelings a day and over 12 million feelings since 2005.
"We feel fine" contains about 5000 pre-defined feelings. When the crawler finds a phrase "I feel/ I am feeling", it records the full sentence, up to the period, and identifies the "feeling" expressed in that sentence (e.g. sad, happy, depressed, etc.). Because blogs are structured in largely standard ways, the age, gender, and geographical location of the author can often be extracted and saved along with the sentence, as can the local weather conditions at the time the sentence was written as well as images. All of this information is saved and then the statistics about feelings is provided.
Now you can even buy the book "We Feel Fine: An Almanac of Human Emotion"
This is an approach that was inspired by techniques used in Listening Post, a wonderful project by Ben Rubin and Mark Hansen.
Another collection of tools investigating the mood on the Web is provided by MoodViews