Just spreading the word on this, an excerpt from the petition itself:

The Department of Homeland Security is funding a $10 million project at the Rutgers University Center for Discrete Mathematics and Theoretical Computer Science and the Center for Dynamic Data Analysis (DyDAn) (both at Rutgers University) to develop software that can track the content of political speech in internet blogs and on social networking sites such as MySpace and Facebook, with the stated intention of identifying "anti-American" sentiment. Rutgers University along with University of Illinois, the University of Pittsburgh, and the University of Southern California are also working with the Department of Homeland Security to effectively monitor and interpret massive amounts of data (such as financial & personal transactions, passports, and visas) to extract “suspicious” people and plans based on behavior patterns that they determine “Un-American”.

For more information, check this site out and sign the petition if you feel so inclined. =)