I have been using it for months. Right now they are experiencing problems due to the Taiwan earthquake.
The software that he is talking about it MIG33.
You can get that software for free if you go to wap.mig33.com from your wap browser, but if he sends an invite , he gets 1$ as credit if you register.
Friend, why not share all the details with our other friends. They will help you get the credits, it wont hurt them. And many times the invitations do not reach the recipients, so atleast this way they can use the software.