Well at least in Arizona it has launched. If you have not checked it out already it is worth taking a look. There is a live chart that has a chat option so peers can communicate with each other. If you are unaware of their promotion they offer free stocks for signing up.
Follow this Link if you want to sign up and receive a free stock!
http://share.robinhood.com/!
Great article!! Signed up for You, I will be glad to reciprocate!)