I know you are on Facebook. That's a given. Would you post different types of things if you knew it wasn't going to go out to ALL of your 150 friends (that is if you are a typical candidate of Dunbar's Number). Quite likely you may have "friended" quite a few more that that!
Facebook though is a great way to have dynamic and real time conversations on various topics. The question is how is the best way to limit those who can take part in the conversation?? The answer is in using the ability to create a group in Facebook and then invite just the people that you want to be in on the topic in question. Once you have a group, you can post conversations and replies on the group's wall and then only those in the group will see it. Here's a little video by Facebook that talks about groups and how they work.
Any ideas how you might use this?? Any of you in the masterminds challenges? :)