Ashley,
I believe I have created something that is exactly what you are looking for. It's a web app called "CollegeComp". You tell it where you went to high school and where you're going to college, and it shows you where other kids from your high school are going to college, and where other kids going to your college went to high school. You can then add a link to your Facebook profile, so you can see things like "Interests: Robotics"
So far there are 190 kids in it, but I would love to see it grow. Tell all your friends and try it out:
http://www.twoplustwoequalsfive.com/collegecomp/