Today we're releasing Service Bus for Windows Server 1.1. Ziv Rafalovich gave me (and you) a tour through one of the most exciting additions we for the server version, the new Windows Azure Pack portal.
For background on Service Bus for Windows Server 1.1 read this blog post by Brad Anderson and then go grab the bits. The best way to do that is to get it as part of Windows Azure Pack, but you can also install the Service Bus 1.1 runtime standalone. Both you can do with the Web Platform Installer.