So, through the holidays I checked tracker sites to see how Xbox One and PS4 availability was... and both were generally sold out. After Christmas, Xbox Ones started to be easier to find.
Right now, I'm unaware of anywhere that has a PS4 in stock. Milage may vary in brick in mortar stores in your area, but online they're pretty much sold out. Xbox One's are available on Best Buy, Amazon, the Microsoft Store, Gamestop, Target, Walmart, and several other retailers.
It could just be that Sony is providing less stock in the NA region... but, I have a feeling that PS4 demand is just a little higher...