For your quick reading, I've listed key statistics about the Iraq War, taken primarily from data analyzed by various think tanks, including 
The Brookings Institution's Iraq Index, and from mainstream media sources. Data is presented as of March 1, 2007, except as indicated. 
  
US SPENDING IN IRAQ 
 Spent & Approved War-Spending - $505 billion of US taxpayers' funds. President Bush is expected to request another $100 billion in war-spending for 2007 and $140 billion for 2008, which would bring the cumulative total to over $700 billion. 
 Lost & Unaccounted for in Iraq - $9 billion of US taxpayers' money and $549.7 milion in spare parts shipped in 2004 to US contractors
  Mismanaged & Wasted in Iraq - $10 billion, per Feb 2007 Congressional hearings
  Halliburton Overcharges Classified by the Pentagon as Unreasonable and Unsupported - $1.4 billion 
   US AND COALITION TROOPS IN IRAQ 
 Troops in Iraq - Total 149,100, including 135,000 from the US, 7,100 from the UK, and 7,000 from all other nations (other than Iraq).
  US Troop Casualities - 3,168 US troops; 98% male. 
 90% non-officers; 78% active duty, 13% National Guard; 74% Caucasian, 10% African-American, 11% Latino. 19% killed by non-hostile causes. 54% of US casualties were under 25 years old. 68% were from the US Army 
  Non-US Troop Casualties - Total 257, with 133 from the UK 
  US Troops Wounded - 23,677,  20% of which are serious brain or spinal injuries (total excludes psychological injuries)
 US Troops with Serious Mental Health Problems 30% of US troops develop serious mental health problems within 3 to 4 months of returning home 
  US Military Helicopters Downed in Iraq - 60 total, at least 29 by enemy fire 
  
IRAQI TROOPS, CIVILIANS AND OTHERS IN IRAQ 
  Private Contractors in Iraq, Working in Support of US Army Troops - 84,105  (NOTE - The US has not updated this count since Oct 2005)
  Journalists killed - 93, 57 by murder and 36 by acts of war
  Journalists killed by US Forces - 14 
  Iraqi Military and Police Casualties - 6,177 
 Iraqi Civilians Killed, Estimated - A UN issued report dated Sept 20, 2006 stating that Iraqi civilian casualties have been significantly under-reported. Casualties are reported at 50,000 to over 100,000, but may be much higher. Some informed estimates place Iraqi civilian casualties at over 600,000. 
  Iraqi Insurgents Killed, Roughly Estimated - 55,000 
  Non-Iraqi Contractors and Civilian Workers Killed - 468 
  Non-Iraqi Kidnapped - 300, including 54 killed, 147 released, 4 escaped, 6 rescued and 89 status unknown. 
  Daily Insurgent Attacks, Feb 2004 - 14 
  Daily Insurgent Attacks, July 2005 - 70 
  Daily Insurgent Attacks, Nov 2006 - 180 
  Daily Insurgent Attacks, Dec 2006 - 185
  Estimated Insurgency Strength, Nov 2003 - 15,000 
  Estimated Insurgency Strength, Oct 2006 - 20,000 - 30,000 
  
QUALITY OF LIFE INDICATORS 
  Iraqi Unemployment Rate - 27 to 60%, where curfew not in effect 
  Consumer Price Inflation in 2005 - 20%
  Iraqi Children Suffering from Chronic Malnutrition - 25% in May 2006 
  Iraqis Displaced by Iraq War, as of Nov 2006 - 650,000
  Percent of professionals who have left Iraq since 2003 - 40% 
  Iraqi Physicians Before 2003 Invasion - 34,000 
  Iraqi Physicians Who Have Left Iraq Since 2005 Invasion - 12,000 
  Iraqi Physicians Murdered Since 2003 Invasion - 2,000 
  Average Daily Hours Iraqi Homes Have Electricity - 9.3
  Average Daily Hours Baghdad Homes Have Electricity - 6.0
  Pre-War Daily Hours Baghdad Homes Have Electricity - 16 to 24
  Number of Iraqi Homes Connected to Sewer Systems - 37% 
  Percentage of Iraqi Homes with Access to Piped Water - 78% 
  Water Treatment Plants Rehabilitated - 22% 
  
RESULTS OF POLL Taken in Iraq in August 2005 by the British Ministry of Defense  (Source: Brookings Institute)
  Iraqis "strongly opposed to presence of coalition troops - 82% 
  Iraqis who believe Coalition forces are responsible for any improvement in security - less than 1% 
  Iraqis who feel less secure because of the occupation - 67% 
  Iraqis who do not have confidence in multi-national forces  - 72%