Azure Service Bus is the core messaging platform that sits at the heart of many sophisticated Azure-based solutions today.
Azure Service Bus Premium Messaging is a new offering, now entering public preview that builds on the successful and reliable foundation of Service Bus Messaging. Premium Messaging provides a number of key enhancements for greater predictability and performance required for the most demanding workloads – paired with an equally predictable pricing model.
With Service Bus Premium Messaging, you benefit from the economics and operational flexibility of a multi-tenant public cloud system, while getting single-tenant reliability and predictability.
You can create new premium messaging namespaces in the new Azure portal right now and give the public preview a try (click "Create" in the menu bar across the bottom of the portal page).
And if you want to learn more about Azure Service Bus Messaging, there's a new 40 minute episode here on Subscribe that goes into more detail on Messaging in general and Premium Messaging in particular.