The Google store has just updated the Pixel Slate order page, which means that the device, depending on the storage options it will come with, will be shipped in late November/early December.
The Pixel Slate with an Intel Core m3 processor, 8GB of RAM, and 64GB of storage will ship in around 3 weeks so if you’d be purchasing it today, you can expect it to be delivered around December 5th. The Core m7 should arrive around the same time.
The Core m3 with 8GB RAM and 128GB storage on the other hand, is around 3 to 4 weeks away and same goes for the entry-level Celeron model with 4GB of RAM and 32GB of storage, which can be expected around December 12th.
The Pixel Slate variant with double the specs should be 5 weeks out, set for December 19th.
In spite of these waiting times, the Pixel Slate Keyboard is going to start shipping first, and should be expected to arrive on November 28th or 29th.
All the products are listed for pre-order on the Google Store and you can find all three of them on Amazon as well.