The Q3 2009 SP2 of RadControls for Silverlight and RadControls for WPF has just been released and the files are available for download under the users' accounts - both trial and dev versions.
Full Release notes can be read at:
RadControls for Silverlight Q3 2009 SP2 Release Notes
RadControls for WPF Q3 2009 SP2 Release Notes
You can also refer to our public RoadMaps for Q1 2010 about RadControls for Silverlight/WPF for more information about what is coming after this service pack release.
Nikolay Atanasov is Product Manager in Telerik AppPrototyper Team