I went through the placement information of Northwestern and their wages to find that in 2011, expected first year salary is around 117k.
Of course, I had to guess on some salaries, such as the school funded ones or "business." I also put part-time positions on their own category, where I made up a wage of 40k for them. Additionally, I counted federal clerks as receiving 160k income because I imagine most article III clerks could get biglaw.
If other people could go through more schools, we could have statistics guiding prospective future students. For example, calculate the expected first year salary of your school, minus how much you expect to make without law school three years from now (per year), minus yearly loan amount you expect to pay.
If someone wants to make a shared excel document, I could add the NU Law 2011 info, and other people can add info. from their school. We can also correct each other. I am not sure how to do this anonymously on Google Docs... so if someone knows, we can start this project.
The danger of a shared document is that one a-hole can ruin the whole project for everyone.