Everybody has been talking about Service-Oriented Architecture (SOA) lately. And it’s not about Web Services, but essentially about service been abstracted from the implementation, published specs of its interface and a formal contract between service provider and its customer.  So, mostly it is about standards in the communication between different platforms and systems – this is where SOAP, WSE (Indigo in the future) come to play. It’s all nice and dandy when you develop SOA systems for desktops/servers, but we’d immediately step into uncharted territory if you try to apply SOA principals when developing for mobile devices. Yes, we can call to Web Services from .NET CF client, we can even communicate with servers which implement WSE (big thanks to Casey for his wonderful work here), but you’d fall short if your project should require a 2 way real-time communication with a desktops or other devices in the almost always connected (WIFI) environment. So this rant is to bring attention of Microsoft folks on this very important subject. Mobile devices are not only used in the end-user retail environment, but also in the enterprise. We need WSE or Indigo for mobile devices.