I applied on USAJobs in February and was notified that I was referred to the hiring official in early March. Two weeks later I received an email about a phone interview and had that interview on March 27. I spoke wiht two SPEs and could hear one of them typing comments as I answered their questions. The questions were mostly behavioral like everyone else has said. They asked about my experience presenting technical information, a time when I had to persuade people to agree with my point of view, how I handle criticism, etc. Before ending the interview I was told that it would take anywhere from 4-6 weeks to hear back from HR. Based on other posts it seems as if they are nearing the final stages and will be making calls any day now (hopefully sooner rather than later). I will definitely update when I know something new (hired or not) because it seems like every one else that interviewed in this time frame is just as anxious as I am to hear back! Update: Received phone call from HR offering me the position on 5/1/2012.