There are a number of sample projects for saving live video to disk, but none that I can find that also include an audio channel. Saving the video and audio such that they are in sync seems to be a bit of a tricky proposition. Anyone aware of a tutorial project out there?
voila: http://www.mindsprockets.com/ look for the “irecord” source on this page by Eric Brunstad… now to get that project to work with the ouput of quartz composer instead of just the camera!