Task-It is a sample app (for task management) that I've developed in Silverlight 4 using Telerik's RadControls for Silverlight.
As the video and blog post series related to this application continues to grow, it's about time to post an index to the resources.
Keep an eye out for new posts, and follow me on Twitter (@rwozniak) if you'd like to be notified when new videos and posts are added!
Videos
Task-It Webinar - Building a real-world application with Rad Controls for Silverlight 4
Populating the RadGridView with WCF RIA Service data
Using RowDetails in RadGridView
Using the RadTransitionControl in Task-It
Populating the RadTreeView with WCF RIA Service data
Using ItemTemplateSelector in RadTreeView for Silverlight
Populating the RadScheduler with WCF RIA Service data
Blog Posts
Introducing Task-It, a real-world application using RadControls for Silverlight 4
Strongly typed property changed notification in Task-It
Handling data load errors on the client in Task-It
Dynamic XAP loading with MEF in Task-It - Part 1
Maintaining page state with MEF
Using the RadTransitionControl in Task-It