You may not be able to buy them in the LAX terminals, but you can in DFW.
There's a Sony vending machine at gate C11 (probably others as well, I didn't wander that far afield while waiting for my plane yesterday) that had one left in it, along with headphones and PSPs, both device and games. Imagine, buying $300 devices from a
vending machine!?! Who'd'a thunk it?
If the Sony folks are reading: That machine is due for a restock.