I found this article by a former USIA employee today when I was looking around. The article lays out the former structure of US public diplomacy under the USIA and the problems that have occurred since integration with the State Dept. From the article, one can see that the current public diplomacy framework is scattered and broken.
I think it elaborates well on the points Prof. Hayden made yesterday about the lack of deference given to PD.
Here is the link to the article, http://www.publicdiplomacy.org/104.htm