Well this question needs to be more specific as in American Soldiers, British Soliders.. But I assume you mean American Soldiers and there are about 20,000 left. As of November 25, 2011.
The answer 30000 was a guess it was in the hundred of thousands
According to globalsecurity.org, the number of soldiers who have died in Iraq between March 2003 to September 2009 is 4,262.
Four(4)
There are over 9,000.
David Finkel on a Road Side Bombs in Iraq
Position of Kurdish Women in Iraq
Why Soldiers Return for a Second Tour of Duty in Iraq
The Human Cost of the Iraq War