I had an initial phone screening through HR, then scheduled a few phone interviews with the folks I'd be working with closest on the team. I then had to prepare a 15-20 minute technical presentation for a panel of prospective co-workers and managers. After that hurdle was cleared, I was brought on-site for a day of one-on-one interviews. Because some folks were busy at that time, I had a few more phone interviews at home. In general, I'd say being an effective communicator and being honest about the subject areas I knew I both was and wasn't proficient in were what got me through the interview.

HR was asking questions about statics, stuff that I learned in undergrad more than 7 years ago. Kind of ridiculous. The HR recruiter was pretty much a parrot, just reading off questions and provided no further explanation and did not take into account your train of thought.