If I did my math right, if they have exactly 400000 units for North America, which probably means just the US and Canada, and going by Wikipedia's population counts for those countries, if they randomly handed out PS3s, you would have a 1 in 826.2025 (or 0.121%) chance of getting one. In Japan it's even worse (something like 1 in 1247)! If you have one, you might be popular...at least with people who still want to even try out the PS3 this year.
And, hey, Lord_die_seis! I posted that same thing like 13 posts before you did (last night, even) and no one responded! >_<