One of the cool new features of the June 2010 Windows Azure Tools + SDK is the integration of IntelliTrace to allow you to debug issues that occur in the cloud.
IntelliTrace support requires .NET 4, Visual Studio 2010 Ultimate and the cloud service…(read more)
http://blogs.msdn.com/b/jnak/archive/2010/06/07/using-intellitrace-to-debug-windows-azure-cloud-services.aspx
