We recently released Silverlight 2 Beta2 for public.  

Silverlight 2 Beta 2 plug-in (runtime), Beta 2 SDK, Silverlight 2 Tools Beta 2 for Visual Studio 2008 can be installed together from the following link:

http://go.microsoft.com/fwlink/?LinkId=120319

Blend 2.5 June Preview provides Silverlight 2 Beta 2 support and can be installed from the following link:

http://www.microsoft.com/expression/try-it/default.aspx?filter=prerelease

Here is a list of new features in Siverlight 2 Beta 2:

• .NET programming support (Visual Basic.NET, C#.NET, Iron Python, IronRuby)
• Isolated Storage for caching support on the client
• WCF support
• ADO.NET Data Services
• LINQ to Objects and LINQ to XML
• Deep Zoom technology
• XML programming
• Media content protection
• Rich managed control framework
• New set of controls to improve developer productivity (CheckBox, TextBox, RadioButotn, DataGrid, TabControl, etc.)

For more details please look at the following link: http://silverlight.net/GetStarted/overview.aspx

Cheers,

Hanu