Where is System.Activities.Design in WF4 Beta2 and Beyond?

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I got an email over the weekend asking about this, and I realized that it’s somewhat buried in this post here.  Anyway, in Beta1, you often saw System.Activities.Design.  For beta2 (and RTM), one important change

System.Activities.Design  => System.Activities.Presentation

The primary reason for this change is that the *.Design suffix is generally reserved for VS design extensibility.  As our designer ships in the framework, *.Design was not the correct suffix.  *.Presentation is where we landed. 

Hoping that putting this in the title lands this high up in search queries so that this post might be useful for a few people.