Hi Jesper Friis Jørgensen,
The Silverlight/WPF compatibility is supported for all controls from Silverlight which have their counterparts in WPF. Like the Coverflow is only for Silverlight and for now there is no way to use it in a WPF application. And vice versa - the Carousel cannot be used in a Silverlight application.
the Telerik team
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Public Issue Tracking
system and vote to affect the priority of the items.