In response to John's post, I would say that I would definately make this a ONE time experiment. The students will need to subscribe and post to the list during this next week. Then, I would have them unsubscribe, unless they wished to become involved in the actual discussion you are having. If anyone finds that students are not unsubscribing, please let me know and I will 'encourage' them to do so. I appreciate the feedback I'm getting both on the list and privately.