Hi intelman,On the adoption front - check out the figures in ScottGu's presentation from MIX09 - http://videos.visitmix.com/MIX09/KEY01 - Silverlight 2 is still pretty new but the figures are looking very strong to me.On the 64-bit front - take your point. If it's of any help then Adam's blog post here - http://adamkinney.com/blog/323/default.aspx - can help work around this by running the 32-bit sidebar.Mike.