I have never heard anyone pronounce "oriented" by saying "orientated". Maybe if they were 12?
orientate |ˈôrēənˌtāt| verb another term for orient.
I suppose that this is just the way that people speak in South Africa? And maybe Britain?
Another pet peeve of mine are people who "Administrate" computers. I don't know of a polite way to correct them short of correctly using "Administer" in sentences that follow, but I usually come away from that feeling as if they think I'm the one using it incorrectly.
Clearly you meant "importantize". Sheesh.