Of course…
Some people are going to be extremely frustred by your conclusion. 
To my English ears oriented sounds wrong, like a made up word for making something more asian. I oriented my appartment by buying a futon.
I’m an American technical writer, former English major, and I dislike “orientate.” I use “orient” in all cases that call for it instead. And my Webster’s Ninth New Collegiate gives “orient” as the definition for “orientate,” and not the other way round.
The English are just mad that we speak their language better than they do.
While we are on the subject of excess syllables, what purpose does preventative serve that preventive does not?
I had always felt that it was a faux-technical back-formation, but I’m inclined to agree with Hermann. To gain one’s bearings or to place something in the proper orientation is to orient it; but when one engages in the activity of orienteering, one does the specialized form of orienting oneself properly referred to as orientating. And that is the only use I’d consider it correct for.
Are people who do this orientators? Because I thought that was a potato dish.
Both forms are common in Australia. I personally always use *oriented * in preference to orientated.
So do you Americans have oriention days when starting a new job?
Hm. Seems that most posters to this thread share my bias!
Well, I’ll avoid being a grammar fiend (since it seems orientate isn’t actually wrong so much as just not right) and not correct anybody who’s using it, but I will silently think condescending thoughts.
But J.R.R.Tolkien would have said orientated being as he was a Brit 
Yeah, but since he didn’t actually seem to write it that way in any of his Middle Earth writings, I don’t really care!
(You may of course reduce me to cognitive dissonance by citing an example of him writing “orientated” or similar in any of his sub-creation literature)
Actually, “adjectivally” and “adverbial” are both words, albeit not necessarily common words.
It’s ironical you should ask that. How about heatlessness and yieldlessness?
This whole topic is quite disorienting! 
As long as we keep a goal-oriented approach to the matter we’ll end up on top eventually.
This is from American Heritage Dictionary:
or·i·en·tate v. or·i·en·tat·ed, or·i·en·tat·ing, or·i·en·tates. --tr. 1. To orient: “He . . . stood for a moment, orientating himself exactly in the light of his knowledge” (John le Carré). --intr. To face or turn to the east.
Oh no, we’ve disorientated Polycarp
It’s ok for one such as I with an xmex-like snout and a xymolosely polydactyl tongue.