That was the theory behind Journolist: An insulated space where the lure of a smart, ongoing conversation would encourage journalists, policy experts and assorted other observers to share their insights with one another [….] At the beginning, I set two rules for the membership. The first was the easy one: No one who worked for the government in any capacity could join. The second was the hard one: The membership would range from nonpartisan to liberal, center to left.
Backstory here.