>Should the business object also control how the datsource is opened, what i mean is datasession etc.>

Yes it should. It also helps make your application data transparently relocatable.

>The controls placed on forms should be control sourced to views (regardless of local/remote this should be finilised by the business object?).>

Yes...again the views give you the first degree of separation between your user interface and your application data.

Regards,