A group of super smart researchers at Carnegie Mellon University (who I happen to be friends with) are conducting a web-based survey about online privacy concerns. They did it last year and your input was super helpful. They told me so. Twice.
Not only will doing this make you feel good and support efforts to protect privacy, you also get a nice shot at several $75 gift certificates for amazon.com.
To participate in this survey, go to: http://cups.cs.cmu.edu/survey-0807/