Colin Eberhardt has a blog post concentrated on ElementName binding in Silverlight via Attached Behaviour.
As a relative newcomer to Silverlight I was happily greeted by the warm feeling of familiarity when I started developing. It is surprisingly easy to make the transition from WPF to Silverlight developer, with most of the core concepts being just the same. However, there are some parts of the WPF framework that you start to miss. One of those is ElementName binding.