Thanks for the info.
One more question, can I install 2.4 and 3.0 Pre-release on the same machine and use 10.0?
Also if I only use ArcGIS Server layers/features in my 3.0 WPF application do I still need to use the deployment tool to deploy the app or can I still use Clickonce to deploy the app to our users in our organization (behind a firewall) as I currently do now.
Thanks.