Chuck, have you verified that the price is $15? because i heard it's mostly marketing and the real price is much higher.
That said, there has apparently been a lot more interest in this chip than Xilinx expected and I got the impression they were worried they had under priced it. But some of the markets they are shooting for won't tolerate a higher price so my hope is that it will hold. At 10K units its only a $150K buy to get the 'good' price, one wonders if you could get enough interest in a kickstarter to meet that quantity goal.