@DougMH
>My app relies on accessing WS as a client JAX-WS
Your mobile webapp can interact with your WS. Use the Visual Designer to layout your UI. Then you bind a UI action to invoke your ajax JavaScript code to invoke your WS client code and update the UI which you must provide. We plan to provide databinding automation in the future to easy the UI update implementation.
> I need to download files from a web site
I believe this is possible for a native app using apis (you provide the driver code). For a webapp you are restricted to living in a browser sandbox.