In this interview with Artima, Anil Channappa, product manager for Adobe's open-source BlazeDS project, discusses various ways to arrange data communication between a Flex client running in the Flash Player and server-side frameworks, such as Spring.

http://www.artima.com/lejava/articles/blaze_spring.html

What do you think of the various ways described in the article for integrating Flex on the client with Java and Spring on the server?

Here is the server side Python code for Flash/Flex RMI via pyamf. It starts a simple WSGI server connecting to localhost.

services = {
    'someservice': lambda data: data
}

if __name__ == '__main__':
    from pyamf.remoting.gateway.wsgi import WSGIGateway
    from wsgiref import simple_server

    gw = WSGIGateway(services)

    httpd = simple_server.WSGIServer(
        ('localhost', 8000),
        simple_server.WSGIRequestHandler,
    )

    httpd.set_app(gw)
    
    print "Running Hello World AMF gateway on http://localhost:8000"

    httpd.serve_forever()

Can't say much about the Java solution. I guess it's less lean ;)