One more awesome demo from Telerik - RadControls for Silverlight Demo with ADO.NET Data Service. Fans of ADO.NET Data Services (aka Astoria) will love that one!
Manish Dalal has a great article on combining the best practices of web and desktop experience in the field of showing large sets of data. He shows how to provide efficient chunked data retrieval of the web, with continuous scroll experience of the desktop calling it Stealth Paging.
Alex Golesh updated his Silverlight TreeView and String-To-Path Geometry Converter to work on RC0. Latest sources and builds are also available.
Mike Snow explores the TextBlock possibilities for TextWrapping and line breaks. One more thing from Mike - how to display special characters in XAML
Jeff Handley wrote about another gotcha in Silverlight - Tab Navigation in Popup Part 2.
Another interesting Silvelright vs Flash comparison: Explode Image Rotator.
After Jessey Liberty wrote a significant amount of tutorials on creating custom control in Silverlight he finally gets to the point of implementing visual states in your custom controls. Read the Dénouement