You need to open an account with the .NET Service Bus, and need to use the .NET Service Bus administration Web site to create a new solution. You can open an account by visiting the following link . More about The .NET Service Bus can be found here.
The .NET Service Bus
Introduction
The .NET Service bus is a powerful and useful feature from Windows Azure Cloud Computing. The .NET Service bus is designed to address the connectivity issues in advanced communication scenarios. The main issue it addresses is Internet connectivity. This post explains how it addresses these issues in real world.
Internet Connectivity Challenge