I applied through an employee referral. The process took 2 weeks. I interviewed at Wayfair (Boston, MA) in May 2013
Interview
Poor in-person interview logistics/experience. I was in Boston for personal reasons, but had to change my trains make it to the office in time. Wayfair refused to reimburse me, even after their recruiting rep said he 'likely' could! Also, top-level managers were unprepared and somewhat unprofessional.
Interview questions [1]
Question 1
Business case -- they presented me an e-mail and their problems with recommend, and suggested ways I might improve it. Also a 'lightning' round of mathematical, statistical, and programming questions that was a little all over the place (and not tailored to your resume), and done in a binary yes/no fashion.