As things are, it's more like a roundtable of maybe 10 people who were gonna be there anyway (didn't have to make room in their schedule for this) that have a trickle of people come in and ask questions of them from time to time. It's also video-taped and broadcast on Public Access TV.
If the thread's getting to dilute for your taste you could always lock the thread, put a (PM your questions) on the end of the title, then when a good question comes in , unlock thread, Copy/Paste folks' questions and your responses, relock thread.