Yesterday, another CTP of Blend 2, THE tool for create Silverlight and Windows Presentation Foundation applications, was released. This time, it's the September Preview.
Here's a list of what was added/changed:

-VS2008 beta 2 full support
-Creation of Controls from existing objects - reuse them all.
-Some enhancements with Split View - now you can see Design and Code both as well as you can do it in Visual Studio
-Storyboard picker - the old Storyboard panel has been thrown and replaced with brand new storyboard picker. Now you can duplicate, reverse or delete existing storyboard or easy modify its properties.
-Aside with new storyboard picker, now you have properties panel both for all sotryboard or single frame.
-New functionality - 3D Vertex animation Long awaited Breadcrumb bar
-Subsetting and embedding fonts within your application (EULA awarded)
-New build options - how you can create custom builds for better integration with Visual Studio
-New abilities of object manipulation - uniformly resize, scale, rotate multiple objects, resizing handlers at artboard. Easy object duplication by dragging with Ctrl-P pressed.

You can download a free copy here.