Hi RTW King

You start off as a junior member. Junior members can post in most fora, but not the backroom of the tavern (although they can still view it). Sooner or later, if you post fairly regularly and politely, you get promoted to member (it's not about post count).

Members can post in all fora, and can edit their posts. There's probably a few other minor benefits.

A few people get promoted to senior member if they make a big contribution to the org, but this is entirely honorific.

And of course, there are the moderators, assistant moderators and administrators, who make sure the Org runs smoothly (again, people are made moderators/assistant moderators for big contributions to the Org). Administrators, moderators and assistant moderators have all sorts of powers, such as the ability to close down threads and edit any post.

For more info, see the FAQ, accessible from the top of the page in the options bar (where log out etc. is)

Hope that's of some help