do you really think that oil is not a consideration in a war in this region? a vast amount of the worlds oil reserves are in the region, and the west is heavily dependent on oil.
the importance of the region doesn't come from all the sand it has.
and do you really think that it has nothing to do with saddam? if saddam was toeing the line with the west, do you really think that the nature of his regime, or his having chemical / biological weapons would really be a consideration.
to be honest, i don't think that the war is solely to do with oil, i think theres a whole load of factors influencing the us and the uk, however, i also don't think its quite as simple as the official lines coming from the us and uk governments.