This is interesting, this would certainly be a very new direction for foreign currency.
Another interesting point is this was not raised during the 2008 APEC meeting, much to the dismay of European countries.
However this time around things seem to have progressed, and Russia has put forth the proposal to the G20, it will be interesting to see how this plays out.
http://en.rian.ru/world/20090323/120689432.html
and this one with some humor: