After some issues with regards to lack of space on my SharePoint Developer VPC (See Extending an existing Windows 2003 system VHD image) I finally got around to complete the installation of the new Silverlight 2 development tools - things you might want to take a install yourself to start experimenting
- Silverlight 2 - the latest build is Silverlight 2 RTW (2.0.31005.0)
- Microsoft Silverlight Tools for Visual Studio 2008 RC1 - make sure that you have Visual Studio 2008 SP1 installed otherwise installation will fail.
- Microsoft Expression Blend 2 SP1
- Deepzoom Composer
PS Remember to clean up all of the previous beta stuff such as the Silverlight 2 SDK Beta 2, Silverlight Tools for Visual Studio 2008 beta and Expression Blend 2.5 June 2008 Preview to avoid problems.