Silverlight is day by day becoming more and more advance. I have found a great link that describes what’s drastic changes in silverlight 1.0 then older versions like mix.Mr. Joe Stegman’s have point out this things in his blog. Here is the link for that blog.
http://blogs.msdn.com/jstegman/archive/2007/06/06/more-v-1-0-changes.aspx