<p>You can go to the individual school's website and look at the admittance profiles, which are rather vague.</p>
<p>Or, you can try Business Week. They have blogs of many MBA students at many colleges and they can give you a good idea on what the different types of backgrounds people have before going to those schools.</p>
<p>You can sometimes find various resume books of current MBA students on student organization websites (ie finance club, marketing club, real estate club). Additionally, some schools feature profiles of students. Either of these resources could give you a better idea of their background (note that their resumes are probably much more polished now than they were when they applied to business school)</p>