As long as supply is short, and since people are eating these up like candy it looks like it'll stay that way in the short term at least, you'll see supply and demand running smoothly (i.e. price increases until there is more of a surplus). You might want to wait a little until the prices stabilize a bit, at least until after Christmas.
And I'm not sure of the exact numbers myself, so you could be right boatillo, but keep in mind the % yield per run on the 0.9's is likely lower than that of the 0.13 due to manufacturing defects which are in turn due to the relative immaturity of the process. But again, you might be right, I haven't looked at any hard numbers myself. In any case, you're not likely to see significant price drops. First, you'd cut heavily into AMD profits if they actually sold it anywhere near what the chips cost. Second, they don't want to undercut their own 754 processors and even 939 0.13's until that stockpile has been more or less depleted.