I am evaluating XPO for use in a WinForms application. Are there any demo apps that show how to integrate  XPO into a typical three-layer (UI, business, data access) architecture? Any white papers or KBs that discuss it?

If not, can you describe briefly how you do it?

Thanks for your help.

 See: http://community.devexpress.com/blogs/xpo/archive/2006/10/13/announcing-the-xpo-publication-service.aspx