Thanks for this screencast. Whilst the summary indicates the separation of UI from business rules as a benefit, the demo hasn't taken advantage of it. Perhaps a demo where the rules engine interacts with an object which is bound to the UI would be a better scenario. This could better demonstrate the separation of business logic from the UI. Additionally, the Rules could be applied to an object in a web app, web service or windows UI perhaps solving the issue: I need to apply the same business/validation rules in the UI and in the middle teir.
PS. Perhaps I should not criticise and do it myself