We now have a brand new, including over 1000 pages, free training courseware for RadControls for Silverlight. It provides tons of tips and tricks, how-tos, code samples (in XAML and both in C# and VB). All these structured in a step-by-step manner and covering most of the available RadControls for Silverlight.
This training material will help you quickly get up to speed with Silverlight and will discuss some of the issues in common with all RadControls such as binding or theming, working with RIA Services (also WCF and ADO.NET), working with Expression Blend, etc.
Nikolay Atanasov is Product Manager in Telerik AppPrototyper Team