Emmanuel and I have been discussing adding an LdapSession into the OperationContext associated with each request pumped into the core. In addition to this I thought it might make sense to add the DirectoryService as well. This way an Interceptor can grab what it needs including access to the registries. Instead of adding the Registries we can just add DirectoryService. This however might not make sense since each Interceptor has access to the DirectoryService used to initialize it.