After an internal referral, I was contacted by an internal recruiter who set an interview date with me for the following week. My interview was with 4 members of the team with roles ranging from developer to management.
The interview was largely unstructured and consisted of discussion regarding various aspects of my previous projects, current employment/roles, relevant interests, thoughts on several common methodologies/community projects, and so on. The tone was informal, very similar to a conversation I'd have with any other web developer I'd just met who was interested in my thoughts on our craft. We reviewed a few of my completed projects from a technical standpoint - one of the devs even spent a portion reading through my published code.
Afterward, I was given the opportunity to review my questions regarding the structure of the team and the particulars of the job requirements. I was contacted with an offer 3 hours later.