The Silverlight Toolkit folks at Microsoft are prioritizing their "Honey Do" list and one of the items on it is to be sure that more of their examples are in VB, not just C#. Of course, the toolkit should have originally had both C# and VB examples, but that's a different issue.
In order for that item to be high on their list, they need to see that there is a demand for it. So if you are a VB developer and would like to see the ToolKit include VB examples, go to their CodePlex site, sign in and vote for that item.
Here's a link for you:
http://www.codeplex.com/Silverlight/WorkItem/View.aspx?WorkItemId=1222


