PS3 games are currently all region free, the box may say it's region X but I've not run in to a problem yet and I've got a US fat 60gb with region 1 and 2 games. I've also lent some of my region 1 games to my mate with a slim and that plays them fine too.
Films however are another story. If it's region locked to a different region it won't play, same if it's a copy. Although with that in a mind a lot of Blurays are also region free, try a google search as there's a site out there that lists the ones that aren't locked.