I have uploaded slides and demos I presented at Tech Ed if anyone is interested in taking a look at them. I presented this last month at in Orlando.
The demos show Dynamic Mapping, Self-Correlation Ports, Untyped Messages, and WCF Calls in Messaging. The WCF demos will require BizTalk Server R2. These demos are as is and may need some configuration changes to work on your system.
To view the power point slides, Office 07 is required.
The slides and demos can be found here.
I was to thank everyone who attended the presentation! I hope to be back next year.