Visio 2010 and SharePoint Designer 2010 can be used in concert to create a workflow. This video describes how each tool plays a specific role in the development process. Visio allows the business analyst to define the process and SharePoint Designer allows the power user to implement the process. Visio and SharePoint Designer feature a roundtrip import/export of the file that enables an iterative process during workflow creation.
via channel9.msdn.com
via channel9.msdn.com
The temptation is great to move to a product like Nintex Workflow versus standard SPD wizard interface. Interesting to see how this compares.