For the time being a Bread Crumb control is not included in in our Silverlight offering. It is in our To-Do list but we cannot commit its availability to any specific release. It is also included in our PITS system and you can give your vote for it here.
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.