I show you how I use Wire Tap Studio to record my interviews and get the output and two separate channels for editing in AmadeusPro. Why I use the lossless export that gives me a .mov file that I have to use other software to split into the two channels rather than just saving directly out. I have a nice work flow that does the job and gives me what I need to edit the interviews for Mac 2 Questions efficiently.
ScreenFlow 2 is ready for distribution and as I have been using the beta to test the new features I can attest that it is a super bit of software. I used it to make the last few screencasts for Mac 20 Questions.