T-Mobile's version was set to arrive in November but it was also delayed at least for a week. They say supplies are limited so maybe that's why you are having a hard time getting a Nexus 6. But don't you worry now, Motorola has finally brought back the Nexus 6 online and listed the smartphone on its website.
The Google Nexus 6 is currently listed will all colors and variants. No, it's nothing like the Moto X when it comes to customizations but at least we have two options: two colors and two memory options. Phone is still a bit pricey at $650 but Motorola will ship it to your doorstep for free.
Motorola will start shipping the Nexus 6 on January after the craziness of the holidays. You can place your order for one now and wait for the New Year to get your hands on the Nexus 6 finally (hopefully!).