In North America you cannot walk into a store and buy a Wii. period.
Back in early March I was stalking GS and BB for weeks before I found one.
End of 2009 Predictions (Set, January 1st 2009)
Wii- 72 million 3rd Year Peak, better slate of releases
360- 37 million Should trend down slightly after 3rd year peak
PS3- 29 million Sales should pick up next year, 3rd year peak and price cut