We have launched a free web analytics tool + survey engine that have been build partly using Telerik Silverlight components.
Try it out at www.UserReport.com
It is a free analytics service that generates detailed statistics about the demographic profile of visitors to a website and also measures user satisfaction. The product is targeted towards webmasters and contains a free survey-tool (build with Telerik silverlight) as well as a free feedback-forum called CrowdIntelligence.
Kind regards Henrik