I started checking out the new Silverlight 4 Beta this week and the most important feature (for me) added to this release : FlowDirection. If you’re not a WPF guy, this is the equivalent of RightToLeft in WinForm world, just recently added to Silverlight. If this works the way the same feature in WPF works, all custom controls built in this platform will automagically have correct RightToLeft behavior, “Almost” without any additional code from component vendor / developer. Sounds too good to be true, but it is.