I’ve just published an article on how to use Windows Workflow’s rules engine to help build n-tier applications:
Building N-Tier Applications with a Rules Engine
I’ve provided it as a PDF to make it easier to print. I’m finishing up the sample application and should have it up this weekend.
When I dug in and started writing this I realized that I was going to have to break it up in to pieces. The topic alone justifies a book. There are a lot of details that could be covered.
For instance: once you have your business objects, how do you write rules?
As soon as I finish the sample and get it published I’ll go in to the actual business rules stuff.