Here is an intersting ling with a few statistics about GNP http://www.scaruffi.com/politics/gnp.html.
Here's another link that puts China at # 3 http://www.lonympics.co.uk/worldsmostpowerfulcountries.htm
Here is a link that project gnp over the next few years http://sun-bin.blogspot.com/2005/12/when-will-chinas-gdp-overtake-us.html

I know GNP is a rough calculation of output cause it includes things like making weapons, cleaning up oil spills, and doesn't include things like quality of life. But as I see it the US still heads the list by rather a good margin.

Also, I remember the years when China had a huge army, extremely powerful on paper, only they had no way to project it.

Unless, China has changed recently, at last I remember they didn't have much of a Navy. Hard to project power when ya got no navy.

However, the way China is growing it is one country that could cause some serious power shifts over the years.