For years, archaeologists have taken the position at CPAC hearings that Americans have no right to lecture foreign countries about how their legal systems treat cultural property. Apparently, however, this does not extend to places like Indonesia, which allows commercial treasure hunters to exploit wrecks as long as they also record their findings.
See
http://news.sciencemag.org/scienceinsider/2011/03/smithsonian-shipwreck-exhibit.html?ref=hp Archaeologists hope the exhibit will be cancelled because the Indonesian government partnered with commercial treasure hunters rather than funding some university to do the work.
The exhibit itself should be interesting. The artifacts provide a testament to the extensive international trade in Chinese goods during the Tang period. See
http://www.nytimes.com/2011/03/08/arts/08iht-singshow08.html?_r=1 I for one hope it makes it to the Smithsonian.