2500 casualties? In a modern war? Over three years? The entire premise is patently idiotic. By any modern standard, or any meaningful standard of comparison at all, this war has been wildly successful.
Although every casualty is a tragedy, Iraqi Freedom will go down as one of the most lopsided defeats in Military history. The remaining aggressors have resorted to blowing up their fellow countrymen... not a winning strategy in anyones book.
These people who are critizing the loss of life should remember that the Brits lost about 20,000 killed in a single day at the Battle of the Somme. In a few weeks the U.S. had about 1,121 KIA at Peleliu, 1,500 KIA at Tarawa, and 6,800 KIA at Iwo Jima. I don't consider the deaths of any sevicemember as insignificant, but historical perspectives reveal that conquering two nations with less KIA that what was incurred in only three of the battles of WWII is profoundly successful.