It seems impossible to use ACS security for Azure Service Bus anymore. The management portal does not let me configure ACS for Sercice Bus anymore and the mythical "-useACS" parameter for the New-AzureSBNamespace cmdlet, as specified here - http://msdn.microsoft.com/en-us/library/dn170478.aspx - does not exist. This is latest everything, SDK 2.4.
What's the story with ASB + ACS? Deprecated? Am I missing something? Really frustrating.