Ability to view contacts by status (e.g. online)

As a user I just want a list of all my contacts that are available at any given moment i.e. their status is Online right now.
Maybe it can be shown as a list on the Contacts page where contacts are listed based on their type currently e.g. All, Company, Guests. Similarly we can list those from my contacts that are Online right now (so based on their statuses).