US Postal Service valuing international transactions no longer in U.S. dollar but in the accepted "currency" of the International Monetary Fund SDRs

US Postal Service:
http://pe.usps.gov/text/imm/immc3_008.htm#ep294909

The Next Global Economy: http://thenexteconomy.blogspot.com/2009/08/us-postal-service-stop-using-dollar-for.html