The IBM Champions for Social Business have been included in the beta (alpha?) of IBM Watson Workspace.  I am able to invite friends to join too.  I just need your IBM ID.  It should be an email address.  If you still have the old-school ID that was whatever username you wanted, you need to create one that is an email address.

Once logged in, you can follow the new features that are getting added here.
Looking forward to exploring the new technology driven by Watson.  I will share more about features after I get familiar with it.