If you are using BizTalk Server 2010 and wanting to send or receive messages using Windows Azure Service Bus queues, you may find you’re missing the brokered message bindings in the transport properties dialog.

First check you have the Windows Azure Libraries for .NET installed (formally known as Windows Azure AppFabric SDK). Then you’ll need to add a few entries to the machine.config (32-bit and 64-bit) to have these show up:
1. Add the following binding element extension to the <bindingElementExtensions> section
<add name="netMessagingTransport" type="Microsoft.ServiceBus.Messaging.Configuration.NetMessagingTransportExtensionElement, Microsoft.ServiceBus, Version=1.6.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
2. Add the following binding extension to the <bindingExtensions> section
<add name="netMessagingBinding" type="Microsoft.ServiceBus.Messaging.Configuration.NetMessagingBindingCollectionElement, Microsoft.ServiceBus, Version=1.6.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
Restart the BizTalk Server Administration Console and they’ll show up.