The Nexus 9 went up for pre-order in the Play Store earlier today, but right next to it in the device list is the Nexus 6. Oh, but clicking through presents you with the dreaded "coming soon" message. At least you know where to find it when the time comes.
Google will sell the Nexus 6 in blue and white colors. $649 gets you the 32GB and $699 ups it to 64GB.