Which region comes into consideration? PSNs for the game?

I was going to buy blackops from canada (i live in europe) but i'm affraid if i buy the copy from there, i won't be able to play with the people i know.

So my question is, the servers that you log in to play, depend on your PSN account or the region of your game?

It depends on how the game is set up for online play. Some games are global and you can play people from just about anywhere while others are set up more regionalized (North America, UK/ Europe, etc.). If someone has the game here they should be able to confirm how this one does the online.

well, since the game hasn't come out i still have to wait to know then