Data binding using Microsoft Expressions Blend, Visual Studio 2008

I want to create a working proto-type of a simple screen that can be used for data entry into a single SQL Server table, view data in a grid and edit the same data. I want to use XAML file and a back end data object.  I do not know how to create the back end data component and I do not know how to bind XAML text fields and list boxes to the data component.   I am looking for an end to end solution that I can load up and then study so that I can understand how data binding works and be able to duplicate the programming techniques used.  Is there a really good tutorial with complete sample code somewhere?  Or, other learning tool to ramp up my knowledge to properly utilize XAML, Expressions, data binding for building business applications?  My work is mostly government, banks, small to medium entreprenuerial clients.