Finally Silverlight Beta 2 is released with lots of improvements and new features, yet the runtime setup file is about 4.6 MB with core controls included! Amazing! If you're using Visual Studio 2008, download the Microsoft Silverlight Tools Beta 2 For VS 2008. This package includes everything from SDK, runtime, to VS 2008 projects and add-ins. Expression Blend 2.5 June Preview is also available for download today. It's a must have for designing the UI.
Noticely the web client and socket have the support for cross domain networking. Though it still requires the annoying XML policy file that must be explicitly created on the target servers before the magic happens. Scott Guthrie has more about the new features.