The best resource for examples and how toes would be our SDK browser. There we have packed the most requested examples together with some best practices that should guide you through your development process. Unfortunately the sdk does not yet provide such an example but you can easily open a feature request giving out the specifics of what you require.
the Telerik team
Q3'12 SP1 of OpenAccess ORM packs Multi-Table Entities mapping support. Check it out.