Do not miss Adam Kinney's excellent tutorial on creating a bar chart in Silverlight 1.0; it is brilliant, and it is a great staring point on working with XAML, JavaScript, JSON data and many other interesting aspects of Silverlight.
Also, while I have you, a quick apology; in my haste to put up today's Tip of the Day I posted a msg. that I would be late; brainlessly forgetting that said message would be sent out via RSS wasting everyone's time and bits. Won't happen again.