What's new in Expression Blend Service Pack 1
Microsoft Expression Blend 4 Service Pack 1 (SP1) includes support for building Windows Phone 7 apps and improved integration with Adobe design tools through support for the FXG file format, as well as bug fixes and stability enhancements.
Windows Phone support
With Expression Blend for Windows Phone, available when you install the Windows Phone Developer Tools and Expression Blend 4 Service Pack 1, you can quickly and easily build Silverlight applications for Windows Phone. You can use the design tools in Expression Blend to create your Windows Phone application, including Windows Phone project and item templates, graphics and animation tools, behaviors, and sample data. Once you’ve created your Windows Phone application, you can build it and then preview it either in the Windows Phone Emulator, which is included as part of the Windows Phone Developer Tools, or in a Windows Phone device attached to your computer.
Adobe FXG support
With the Expression Blend Add-in for Adobe FXG Import, available when you install Expression Blend 4 SP1, you can add Adobe FXG 2.0 symbols as UserControls in Expression Blend. You can also configure your FXG settings so that when FXG files are updated outside of Expression Blend, the files you have added to Expression Blend are also updated.