5 more BizTalk samples are live in the MSDN Web site. I wrote three of them as follows:

1) SSO as Configuration Store
This sample provides an implementation of a sample class and a walkthrough that demonstrates how to use the SSO administrative utility and the SSOApplicationConfig command-line tool.    

2) Atomic Transactions with COM+ Serviced Components in Orchestrations
This sample demonstrates how atomic transactions work in orchestrations.    

3) Using the SQL Adapter with Atomic Transactions in Orchestrations
This sample shows how to use the SQL adapter with atomic transactions to keep databases consistent.     

 In my samples, I used to BizUnit 2006 to make it easy to repro the steps and change the samples. If you have any feedbacks about the samples, please leave a message.