Well, it seems that some shipments may start earlier than stated — perhaps as early as tomorrow. At the Google Store, the middle model ($1,199) with Intel Core i5, 8GB of RAM and a 256GB SSD will ship from tomorrow, October 29. The base model ($999), with 128GB of storage, is pushed back to November 5 at this point. The special edition ($1,649), with an Intel Core i7 and 512GB of space, is still on a waitlist.
While you may be able to pick up a Pixelbook Pen for $99 at all places, the Preferred Care plan at $249 is only available from Google.