I've been analyzing it on the assumption that it was most likely coordinated between Saddam, French intelligence, and Blair and Bush's domestic enemies in their countries' respective intelligence communities. A corollary of this hypothesis would imply that Wilson had some ally within Italian intelligence--either from the Italian branch of the CIA and/or from another intellience agency with a liasion to or agent within Italian intelligence (could in theory be French [since Wilson's deepest ties seem to be to French Africa], old KGB or East German connections, etc.). It'd be interesting if it'd be possible to identify which Italian political factions supported Blair and Bush's political enemies during the Iraq debate and whether any of these have connections with Wilson or one of the other players--Berlusconi's certainly gotten a lot of flack for supporting the Coalition.
Haven't we read this before, a LONG, LONG time ago?