Hello Nico,To push updates to the client I would use messaging, and would use remoting to push updates from the client to the server.I would also look at our new LCDS SAP connector, it should dramatically streamline your development.Finally, our recently pusblished article should of interest to you : http://www.adobe.com/devnet/flex/articles/project-hendrix.html.You'll have there a glimpse at the architecture of one of our past project where sap lcds and flex were involved.Cheers,François