Guess there is only left to say that when and if Yammer's model works, Twitter only needs to copy it and call it a day. By the way, I am thinking about impleme

Guess there is only left to say that when and if Yammer's model works, Twitter only needs to copy it and call it a day. By the way, I am thinking about implementing a similar model for my soon-to-launch Twitter for the homeless (incl free iPhones).