To add to Tom's assessment, it is actually worse. China was buying our debt, it appears they have slowed down or all but stopped buying it, and they know the debt will go worthless as hyper-inflation sets in sometime in 2013.
If you doubt the sheer amount of US $ flowing to China, just pick a store, any store, not Wal-Mart, and browse through and look at where the products were made. Ninety percent will be China.
Also, with all of the money they have made, they have been buying raw materials, like metals (one of the reasons for the pressure on, and subsequent price increases on brass, lead, etc. for reloading as one example), and feeding their own economic development. For example, they are also doing multi-year (in fact multi-decade) huge scale development of dams, roads, airports, buildings, etc. with our cash. All this puts further demand on raw materials like cement, lumber, etc., increasing the prices to us. Oh, the people have to be fed, so they are buying foodstuffs as well.
In the past year, the world-wide economic hit has affected them, as companies like WW and others are not buying as much, so now the Chinese are taking an economic hit because we have taken a hit.
It's complicated, sort of, and messy, and it will get a lot worse. Once we hit the crapper in 2013 (the year a lot of bho's programs' price tag comes due), the Chinese will still want the vig on our debt, and we better be able to come up with it, or they will "break our legs" (i.e., take our assets).
A number of observers have been referencing BRIC - Brazil, Russia, India and China as the next big economic power block. Brazil has the resources, India the people, China the capital and Russia the muscle.
Long answer, hopefully providing some context.