Missed this earlier from the SMH:
The Reserve Bank of Australia says the dollar is held by as many as 23 central banks from Brasilia to Moscow, documents showed.
The central banks of Brazil, Russia, Germany, Hong Kong, South Korea, Poland, Sweden, and Switzerland are among 15 economies that hold the Australian currency, according to a spreadsheet created in July and other papers released today under a Freedom of Information Act request by Bloomberg News. Among the eight possible holders are Iceland, Indonesia, Jordan, Malaysia and Singapore, they showed.