This paper describes our first experiences with PARDIS, an environment containing support for interoperability of PARallel DIStributed applications. The design of PARDIS is based on the Common Object Request Broker Architecture (CORBA); however it extends the CORBA object model by introducing SPMD objects representing data-parallel computations. SPMD objects allow the request broker to interact directly with the distributed resources of a parallel application; this ensures request delivery to all the computing threads of a parallel application, and allows the request broker to transfer distributed arguments directly between the computing threads of the client and the server.To demonstrate the performance potential of the SPMD object abstraction we will examine two methods of distributed argument transfer. We will show that taking advantage of a parallel interface to the network and the application-level knowledge of data distribution can significantly improve data-transfer time between client and server. Further, we will show that interacting directly with all resources of a parallel application scales well with the increase of computational resources at client and server.