PS4 availability in the US?

Over here in Europe, it seems to be extremely difficult to get hold of PS4's at the moment. Apparently a lot of people will have to wait until January...

I was just wondering whether the situation is the same in the US? Do the shops there sell them freely (without preorders)? How long do you guys have to wait on average?

Thanks

By the way, please leave Microsoft out of the discussion, I don't care.