I was at toys r us yesterday, the chap said that they expect incrimental small shipments via fed ex. I dont know if he just wants me coming back to the store everyday or what.
Interesting enough, he said that finding a console shouldnt be a challenge, but finding additional controllers and accessories will be.
Stopping at Target yesterday, they had PS3s on the shelf when I was there(for how long I dont know) but no wiis.
So my advice, and my plan is to check early check often.