I applied online. The process took 2 weeks. I interviewed at American Express (New York, NY) in Feb 2014
Interview
First had two phone interviews, each lasting roughly a half hour. Mostly behavioral - ex. "What was a time you overcame a difficult situation to obtain a result?" and the like. Relatively easy stuff.
Next was in person interview at their office in NYC. Met with two managers, both for a half hour, then had a half hour break between and talked with their "ambassadors", or recent hires. Overall a pretty nice experience.
Interview questions [1]
Question 1
Tell me a time you took a risk to do what you thought was right.