I applied online. The process took 1 day. I interviewed at Northwestern University (Evanston, IL) in Oct 2012
Interview
First you submit a paper application which can be found on the IT website. Then you sit down with a few senior student consultants as well as the full-time manager for an in-person interview. After that, you are asked to work through a few mock-calls and problems that mimic what you might face out on the floor.