As of Monday, April 2, 2007, at least 3,256 members of the U.S. military have died since the beginning of the Iraq war in March 2003, according to an Associated Press count. The figure includes seven military civilians. At least 2,621 died as a result of hostile action, according to the military's numbers.
For the ever rising cost of the war (and what exactly are we getting for our investment?), see the Iraq War cost ticker in the left margin of this page.