http://en.wikipedia.org/wiki/Phenom_(processor)
(Not trying to be anal or anything, but bear with me, sometimes I really come out as one)
According to that wikipedia article, phenoms with 2 defective cores will be marketed as Athlon X2s ("Kuma") and 3 defective cores as semprons/single-core athlons ("Sparta"/"Lima"). Those triple-cores are codenamed "Toliman" (just showing off *cough*my*cough* knowledge here!). This makes sense, too, since even if the CPUs got three defetive cores, it can still be sold for sweet, tasty profit AMD really needs right now.
P.S. I do *not* hate AMD!