Christopher Penn's response: 1. Remind strongly all people who sign up as speakers that Podcamps obey the law of two feet. If you offer nothing of value, people can, will, and should walk out. Feel free to pitch, but you'll be pitching to an empty room. 2. Do NOT have a panel moderate speaker sessions. Instead, put up a survey using Google Docs, SurveyMonkey, or the survey tool of your choice, and allow EVERYONE to choose what to have if you are space constrained. This preserves the democratic nature of Podcamp while helping with space considerations.