NOT JUST THE MISSILES: Saddam would be truly dumb not to destroy his al Samoud missiles. Although they're not WMDs, they are illegal under the current sanctions. And the p.r. effect of destroying them would be enormous among the gullible peace-at-any-price Europeans. But it's the WMDs - especially the unaccounted for anthrax, botulinum, and VX gas - that we need real answers about. And action.
Yeah, this refusal is mind-boggling. Saddam is evil, not crazy or stupid. What on Earth can he be thinking? These al-Samouds are virtually meaningless to his warfighting ability—they're converted SA-2 SAMs, with a payload equivalent to maybe ten artillery shells. Heck, if Saddam were really smart he'd have built these toys simply to have something to give up. If he let Blix take them away, the "peace in our time" crowd would almost unquestionably carry the day, and any threat of war within the next year (at least) would vanish overnight, buying him time to finish his nuke.
Brining down Saddam over the al-Samoud is like busting Al Capone for tax evasion. If it gets the job done, well, so be it, but the whole situation is faintly absurd.