I think of NCD as like a LAN party of yesteryear. People show up to have a good time, connect, and play what they want, when they want. Maybe they do, maybe they don't, maybe someone shows them some awesome game they haven't seen before so holy shit gimme that disk and your CD key so I can play with you too. Also Bawls. Also discussions on which is better - Unreal Tournament or Quake? (UT obviously)

If you're expressly here to drive engagement for your specific project/agenda - I wouldn't expect much traction, especially if what you're covering realistically only allows individual contributions to little more than "Save the Rainforest".

I've watched your shows before, and some of it is really insightful to those issues - I'd suggest tempering your expectations on user engagement if that's your goal.