I applied online. The process took 7 weeks. I interviewed at Teach for America (New York, NY) in Dec 2011
Interview
Original online application with an activity to show critical thinking and presentation.
Then phone interview (about an hour). Phone interview consisted of many behavioral questions (tell us about a time when you hard difficulty with a co-worker etc) and then at least two roleplays.
Then waited for about a month, then offer extended.
Interview questions [1]
Question 1
Be prepared to do role-plays (talking to an angry corps member etc.)