On this day of the first debate between the two candidates two pointers to sites that keep a tab on the sentiment in the press as well as in the Blogosphere.
Ecoresearch is using the strength of computers let them count words in press articles. From the word count they analyze the attention and the attitude toward the candidates. Results are quite lopsided: 2/3 of attention goes to the President.
Technorati also has a political section where they dissect the Blogger's sentiment including some graphics.