Newark had stock the weekend of Dec 9, but I ended up back ordered. To my surprise, I got a Pi delivered yesterday (Dec 21). I think they must be becoming a bit less supply constrained at the moment, at least compared to some of the delay stories I've heard from a few months back. If you order from Newark, you might also want to consider the Adafruit-approved USB power brick
which Newark also distributes; I suspect it's better specced than some of the random "this should work" parts out there.