Once a sentence containing "I feel" or "I am feeling" is found, the system looks backward to the beginning of the sentence, and forward to the end of the sentence, and then saves the full sentence in a database.
See also Lovelines. Human desire exploration.
Through large scale blog analysis, Lovelines illuminates the topography of the emotional landscape between love and hate, as experienced by countless normal humans keeping personal online journals.
Interestingly, We Feel Fine has an open API. So great to see artists offering their work to be shared and smushed. Very interesting, fertile ground around allowing Joe Software Developer (and not Roger CompSci) to write programs that blend two or more systems together.
(Both programs released May 8, 2006.)