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We now have groups for promoting Stack Overflow on some social networking sites.

Everyone's welcome to join any of them.

Currently I'm the sole admin for the LinkedIn group. I don't want to be - LinkedIn requires an admin to approve all new members).

What does everyone reckon is best practice for these sort of groups? I was thinking that we could use similar rules to SO - if you have over 4000 rep you're welcome as an admin, that sort of thing.

If you are a member of a networking site not already listed please add it here.