Create a private community by selecting a group of users from the address book.
a. System creates community
b. Automatically invite selected users to join.
From contacts, select user(s) and spawn chat, meeting, invite to community, etc
Portal-wide User Actions
From anywhere within the portal, when a user is encountered (in a profile, forum, blog, etc.) be able to check if a user is part of User's contacts and if so, provide links to chat, create meeting, etc.