Here’s the main “Getting Started” page for Silverlight. This will give you the links to download the tools for VS 2008 and the bate SDK.
http://silverlight.net/GetStarted/
MSDN Silverlight Developer Site
http://msdn2.microsoft.com/en-us/silverlight/default.aspx
Silverlight Architecture
http://msdn2.microsoft.com/en-us/library/bb404713.aspx
Runtime/Plug in Overview
http://silverlight.net/getstarted/overview.aspx
Silverlight 2 Beta 1 – Development with the .NET Framework
http://msdn2.microsoft.com/en-us/library/bb404700.aspx
Road map info from Scott Guthrie’s blog….
First Look
http://weblogs.asp.net/scottgu/archive/2008/02/22/first-look-at-silverlight-2.aspx
Whitepapers
http://silverlight.net/learn/whitepapers.aspx
A free, fully functioning professional quality Silverlight2 data grid from DevExpress with full source code. Pretty slick.
http://www.devexpress.com/Products/NET/Components/Silverlight/Grid/