Here in SF looks like stock is coming up for 6s (not 6+s) but when i went today they still didn't have any 64 GB models, only 16.
I've really been holding out to get a device-only Verizon 64 GB model for the added flexibility/resale, but may just have to bite the bullet and order a full price AT&T model direct from AT&T. Getting tired of waiting....