If you're exicted about Silverlight you might want to check out "GOA WinForms for Microsoft Silverlight" which is a implementation of Windows Forms on top of Silverlight by a company called Netika.The product comes in two editions: Free and Professional - The free edition includes all the standard Controls included in the System.Windows.Forms library (about 40 controls). This is truely AWESOME! - Here's the mandatory links :-)
Download the Free Edition
Try out the Design Surface demo
Live demo of the controls