I'm attempting to produce a podcast on the cheap and I purchased two USB microphones. I had hoped to be able to run them simultaneously, but the MacBook recognizes one or the other, but not both. Tech Support at Mac tells me Mac doesn't make any kind of adapter or mixer that would allow me to use both mics at the same time. I've seen a bunch of thingies online that will allow plugging several standard audio microphones through a single USB port, but none that will allow two USB mics through a single port. Does such thing exist? Any help with this would be greatly appreciated.