The ESB Toolkit 2.0 (former ESB Guidance) is finally available for download. You find it here.
The BizTalk ESB Toolkit 2.0 provides architectural guidance, patterns and practices, and a collection of BizTalk Server and .NET Framework components to simplify the development of enterprise-scale solutions on the Microsoft platform. The toolkit also provides capabilities to help developers extend existing messaging and integration solutions. The BizTalk ESB Toolkit 2.0 consists of a collection of interoperating components that support and implement a loosely coupled messaging environment. This environment simplifies the process of building dynamic message-based enterprise applications.