I've been glued to nowinstockdotnet for the past week trying to score a 1080 SC or FTW which checks Amazon, NewEgg, and B&H along with some foreign ones. Sign up for the free account and setup browser alerts, it will refresh the page every 30 seconds, sound an alarm while the window is open, send you text/email alerts, and let you customize the list for exactly which part numbers you're looking for. I managed to score an EVGA 1080 SC last night on Amazon around 115am Eastern thanks to it. Surprisingly they were in stock for about 2.5 minutes instead of the usual 45 seconds.
I did get an email notification from EVGA for a 1080 FTW earlier yesterday, but I didn't see it until 20 minutes afterwards, and they were of course gone by then. I had the page up and everything but was busy doing something else in the apartment so wasn't manically refreshing the page. Good luck to all, hang in there!