Speaking of the cloud's mispronouncables

Boris Evelson tweeted a fine question yesterday morning, but it's too easy: how to define Saas? If he's going to all that trouble, why not also define Saas's younger siblings: platform-as-a-service and infrastructure-as-a-service. To be a real hero, though, he has to take on the real pain: how to pronounce "Iaas" and "Paas."