China has made several statements in the last few weeks about their concerns about the dollar. However the real BIG news is not their talk, its their actions. China has been moving their dollar holdings into short-term bills out of longer-term notes. They are positioning themselves so that they can get out of the dollar quickly - and they are doing it in a way that won't raise alarms because they aren't (yet) cashing-in their dollar holdings.
http://www.atimes.com/atimes/China_Business/KC18Cb01.html