Developing Workflow Solutions with SharePoint Server 2007 and Windows Workflow Foundation

http://msdn.microsoft.com/en-us/library/cc514224.aspx

Workflows roadmap

http://technet.microsoft.com/en-us/library/cc263262(TechNet.10).aspx#section1



http://msdn.microsoft.com/en-us/library/ms416312.aspx

Plan workflows

http://technet.microsoft.com/en-us/library/cc263134(TechNet.10).aspx

Developer Introduction to Workflows for Windows SharePoint Services 3.0 and SharePoint Server 2007

http://msdn.microsoft.com/en-us/library/aa830816.aspx#office2007ssintrotoworkflows__compvs2005designerforwinwfandsharepointdesigner

Administering workflows

http://technet.microsoft.com/en-us/library/cc531334(TechNet.10).aspx