I applied online on 3/2, completing a company-specific application and a personality test. The following day a recruiter called me to go over a few questions on my application and schedule an interview. She gave me the choice of taking a phone interview, or driving out to their office in Austin to do a face-to-face interview. I said that because of the distance, I would prefer a phone interview. Either way, the interview would've been with HR.
I spoke to the same recruiter a week later for the interview. She called promptly at the time we had agreed upon, and was very enthusiastic and professional. She started with basic questions about my background, asked me to provide examples of my sales and management experience (behavioral interview), and ended with questions I had for her about the company. I have not had any sales experience past retail (in a family business) and many of the questions were about hard selling/upselling so I came away with the impression that they might want someone with more sales experience (however, I was told they hire more than 8000 kids straight out of college per year, so I don't know how those two fit together). I was told that the process is very selective and that she would need a few days to review my file and decide what her recommendation would be.
Make sure you know some background about the company and tie it into why you want to work for them. Also, underscore your passion for sales and advancement within the company. I made the mistake of asking whether it is possible to move into other departments in the future, such as HR, and was told it is extremely unlikely and that they want their salespeople to advance within sales rather than move out. Overall, this interview was great practice with a nice representative.