Im sorry to say this but who's fault is it that there is a supposed shortage. the shortage isn't as extreme as people are making it look to be as its a fact that the 360 sales in the US went up this week.
there is a shortage but the demand isn't high enough to make a difference. anyone right now could goto amazon and buy any version of the 360 they want.
a true measure of supply constrained is the wii where demand is greater than supply and you cant buy a wii for less than 350 bux from resellers online. only way in my area to get a wii at retail price is to stalk for new shipments.