Would be nice to have a possibility to contextualize the chat for a specific resource.
*User "starts a chat" for a resource (e.g. document, wiki page, etc.) to discuss it with another online user from the list of the chat buddies
*New Chat window for the other user opens and it contains a link to the resource (as a "title" i.e. "context" of the chat)
*After chat is finished, users can choose to persist their chat as "comment" on the resource (same scenario could also be applied to group-chats)
*Added "chat-discussion" about the resource is available via activities portlet