sorry to be blunt Zulu (I'm actually busy today!!
) but oil is and will be the driving force for all western nations until it runs out - why the government wont just say that is beyond me (well actually they'd be crucified in the media - but who listens to the media?)
the cost in lives on both sides, while utterly tragic, is a price I'm surethey've factored in to the equation - however distasteful it may be.
Like I say it's blunt and simplistic but thats the cold hard reality in my opinion - the job had to be done 
So it was a complete waste of time on all levels then. The majority of oil drilling rights in Iraq were recently sold by the Iraqi govt to - the CHINESE.

the main benificiaries are oil companies Shell, Petronas, Total, Exxon Mobil, etc China National Petroleum Corporation (CNPC) did bid for large chunks of the biggest oilfields..........and where they bid the most, they won - its our old friend capitilism again Albs - it'll bite you everytime, US and UK took the brunt of the cost and everyone else gets dibs on the juicy oil contracts, because Iraq will sell the rights to the highest bidder - quite rightly too as they've a country to rebuild 
Still doesn't make going in and securing shedloads of oil wrong 
I certainly agree that the aquisition of oil figured in the path to invasion but I would suggest that other factors played a prominent part in this march.
I think that US domestic policy, development of overseas business markets but more importantly, the excuse to have a US military presence in this important region was, perhaps, near the top of the list when these 'plans' were being made.