I was wondering the same. After doing some digging, I haven't been able to find out much, other than that its supposed to launch in October, so we should start seeing it by the end of the month hopefully, or possibly sooner.
Lets keep this thread updated with any news that surfaces on the new x series availability.
Hopefully these wont be as difficult to obtain as AMD with their 3900 has been since launch. Those couldn't hardly be found without paying 50%-70% extra. Hopefully Intel has anticipated the demand these price drops will incur and has prepared accordingly so everyone doesn't end up getting price gouged. With all their fabs, they should be able to handle it as long as they plan accordingly, and if not, that just goes to...