Content Curation - Can you add value to your learning programs with content curation?

There's a tremendous amount of content that has already been created.   What role does content curation play in learning strategy?  What are some of the important functions of a content curator?  What are the ethics of sharing content created by someone else?   Margot Bloomstein presented on this topic at SXSW 2011.  Her presentation starts creating a structure for content creation and discusses how to add value during the process.   I hope it will start a discussion at E-Learning Council on this learning function.