First, this is something that works now. More importantly, this is a textbook network effect market. Skype users are what makes Skype work. If MS announced the

First, this is something that works now. More importantly, this is a textbook network effect market. Skype users are what makes Skype work. If MS announced they building their own, what odds would you offer me to bet I use it to talk to my Mother on it within 2 years?