I like http://nces.ed.gov/collegenavigator/
It’s run by the Dept. of Education, so I’m confident that the statistics I read are real.
Among the things I’ve found useful is the percentage of kids that receive institutional aid, and the average amount.
If 98% or 97% of the student body receive an average of $10,000 from the school, then I can probably assume that my son will receive somewhere in that ballpark.
So far, it’s matched what the Admissions people we’ve spoken to have told us from the individual schools.