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

1) BAM and HAT Correlation
This sample demonstrates how to use the enhanced BAM features, and how to customize BAM and HAT integration. This sample also includes a Windows Forms application customizing BAM and HAT integration for the sample BizTalk solution

2) Using Role Links
This sample demonstrates how to use role links and parties.

3) Using Enterprise Library 2.0 with BizTalk Server
This sample demonstrates how to use Enterprise Library 2.0 with BizTalk Server.   

4) Consuming Web Services
This sample demonstrates how to consume Web services in a messaging-only scenario, and without using the Add Web Reference option

If you have any feedbacks about the samples, please leave a message.