The Daily Ablution Presents a Good Summary of the British press response to Koffigate, and a commenter cuts to the quick. You might add a few qualifications, but this is about right:

'This is an important story. If the UN folks pushing a diplomatic/inspections solution with Iraq were bought and paid for there is a significant argument the Bush side can make that the 'multilateral' system was hopelessly corrupt. Note that we could never hope to know the extent of the corruption sans invasion. Most of the evidence coming to light has been Iraqi documents. '