Re: Start up
Oh and group 0 is always public, so its a good place to post general topics, information about joining the game, etc. But, if you want to have your game locked down for the actual posts, OOC, etc. then you can create threads on different group numbers and assign the players to those groups.
Some DMs give each player a private group with a private thread to post side stuff, but sometimes that's just better in the PM section.