Hi to everybody...Technomist asked an interesting question....here's what I found out about who owns the USA's huge debt...
piechartusdebt

Click on it to see larger version.

Here's the site I got it from....
http://www.optimist123.com/optimist/2005/11/pie_chart_of_wh.html

Here's the latest figures....the above is 2005...
http://www.ustreas.gov/tic/mfh.txt

I've just found a pie chart of the latest figures...interesting to compare 2005 with now...
Foreign_Holders_of_United_States_Treasury_Securities-percent_share