It occurs to me that when people come visit a wiki community, or any other OnlineCommunity, perhaps it should be CommunityExpectation to have a live, synchronous phone conversation with the new people.
This is in order to:
The phone call would be between the person in the VisitorRole, (on their way to the GuestRole,) and an active CommunityMember. The CommunityMember should be responsible for posting a summary of the call to the wiki, perhaps on a date page. The phone call could be anywhere between 10 minutes and 2 hours.