Binding to SelectedItems in WPF ListBox.

Here's a very interesting approach to solving the "can't bind to selected items" issue with the WPF ListBox control.  I'll definitely want to look into this more later, as I haven't had a chance to yet.  I'm still fighting issues getting CheckedItems initialized on my CheckListBox control that I've written and it suffers from the same issue as SelectedItems in ListBox.

Alex's blog has the approach I'm referring to.  Check it out.