I went through a couple of phone interviews, specifically a phone screen and then a more in-depth interview with the Director of Support.
After that, they flew me out to the Seattle location where I interviewed with that Director in person, one of the more senior support staff, and the CTO, in increasing technical focus. This is a little different from the current process however.
Currently, most people in this or similar positions will do the phone screen then interview with one or both of the support managers, and then will come in for an in-person interview with the support team as a panel. This second interview is somewhat technical, but is generally more casual because of the nature of a panel interview.
This is generally followed with a quick call with the Director, and then a final decision is made.