Just added a short how-to to the user guide, suggesting one way in which you might like to organize domain services... [1]
Currently we are going through our app (Estatio) to fit this approach; it being derived in part on the approach that is used on the .NET naked objects project over in Ireland. Cheers Dan [1] http://isis.apache.org/guides/ug.html#_ug_how-tos_domain-services_organizing-services
