I get an exception in the SaveLoadSample demo. It occurs in Page.xaml.cs in the OnLoad method, line 51.

var xml = input.GetProperty("value").ToString();

Here's the exception detail.

System.NullReferenceException was unhandled by user code
Message="Object reference not set to an instance of an object."
StackTrace:

at SaveLoadSample.Page.OnLoad(Object sender, RoutedEventArgs args)

at System.Windows.CoreInvokeHandler.InvokeEventHandler(Int32 typeIndex, Delegate handlerDelegate, Object sender, Object args)

at MS.Internal.JoltHelper.FireEvent(IntPtr unmanagedObj, IntPtr unmanagedObjArgs, Int32 argsTypeIndex, String eventName)
InnerException:

Otherwise, the demos look great.  I'm happy to see the Silverlight library developing.  Thank-you.