Amazon's open to orders again, but still not in stock and no ship date.
I looked again at the Sales Rank and found a different number for "On Contract Phones" (instead of all cell phones and accessories). Interesting numbers:
#1 HTC One
#3 S4 white
#38 Moto X
#57 Moto X white
#67 Ultra Red
(these are all for service on VZW -- so for instance, HTC One on AT&T is ranked at #15)
So Amazon's selling this phone... but obviously "blackout" days aren't helping, nor (I imagine) does the constant "unavailable / no ETD" listing. Hopefully good news soon for you.