Some Best Practice Documents and info on Windows Workflow Foundation
A couple of resources for you all in case you have missed these on the web….
(and in case you have lots of questions!) I am a fan and advocate of best practices so the docs on sharepoint and CMS may be worth a look. (Just a disclaimer – I have not read them yet. I am just blogging the locations for now until I get a spare 12 days! :-))
Windows Workflow Foundation: http://www.msdn.microsoft.com/windowsvista/building/workflow/
Best Practices for CMS 2002 for Reusability: http://msdn.microsoft.com/library/en-us/dnmscms02/html/CMSDesigningCMS2002Sol.asp
Best Practices for SharePoint solutions for Reusability: http://msdn.microsoft.com/library/en-us/odc_SP2003_ta/html/WSSSharePointCodeReuse.asp