Sony have confirmed that there will be 500,000 PS3 consoles available at launch.
100 Thousand PS3 in Japan/Asia
400 Thousand PS3 in USA
Sony hope to have shipped a total of 2 million PlayStation3 consoles before Dec 31st 2006 and 6 million by 1st April 2007. They have warned not to expect this many actually available for sale, as they take time to get from the factory to the retailers.
Shortages in components that are needed to make the game console mean that these numbers are constantly changing and should therefore be used only as a guide.