Whenever you think about a n-tier application the challenge is the data transport. You can use the WCF, Webservice or whatever mechanisms to transport your data. That means that the OpenAccess session does not no about this data anymore. Whatever you do on the client side you have to track all the changes and send them back to the application server.
At this point OpenAccess comes back in place. There is a class ObjectNetworkAttacher that can register your data again in the ObjectScope. The class comes in source code and is in the src dir of the product.
What you do on the client side is not longer OpenAccess dependent. The objects are now normal .NET objects. ObjectView, ObjectProvider or OpenAccessDataSource will not work anymore. You have to use object binding.
If you think about using the ObjectContainer it is different. The container tunnels a bag of data through your communication channel and behaves like the scope on the front tier. You can fill the container with all kinds of data and work with him like with the scope.
the Telerik team
Check out Telerik Trainer
, the state of the art learning tool for Telerik products.