A few days ago I wrote a blog post explaining a sample solution that took data into a WF 4.0 service, used the BizTalk Adapter Pack to connect to a SQL Server database, and then leveraged the BizTalk Mapper shape that comes with AppFabric Connect.
I had promised some folks that I’d share the code, so here it is.
The code package has the following bits:
The Admin folder has a database script for creating the database that the Workflow Service queries. The CustomerServiceConsoleHost project represents the target system that will receive the data enriched by the Workflow Service. The CustomerServiceRegWorkflow is the WF 4.0 project that has the Workflow and Mapping within it. The CustomerMarketingServiceConsoleHost is an additional target service that the RegistrationRouting (instance WCF 4.0 Routing Service) may invoke if the inbound message matches the filter.
On my machine, I have the Workflow Service and WCF 4.0 Routing Service hosted in IIS, but feel free to monkey around with the solution and hosting choices. If you have any questions, don’t hesitate to ask.
Richard Seroter's Architecture Musings 
Richard,
The zip file does not exist.
Thanks,
Howard
Do’h! Bad link. Fixed now. Thanks for letting me know.