Microsoft ESB Guidance: If you all are interested on Microsoft Enterprise Service Bus (ESB), then have to check this site
http://daveandal.net/articles/esbdocs/
they have an excellent architecture guidance on ESB package for enabling Service-Oriented Architecture (SOA).
Target Audience for the Microsoft ESB Guidance
This guide is intended for developers who create BizTalk or other solutions that leverage the Microsoft ESB Guidance components. To take full advantage of the Microsoft ESB Guidance, developers should possess knowledge and experience in working with:
%u00b7 Microsoft BizTalk Server 2006
%u00b7 Microsoft Visual Studio 2005
%u00b7 Microsoft .NET development techniques, including the development of ASP.NET Web Services and .NET Framework components
The ESB Guidance package CTP3 uses features of BizTalk Server 2006 R2.
http://www.codeplex.com/esb/Release/ProjectReleases.aspx?ReleaseId=6291