Adam:
The OB on 15 is not arbitrary ... they had to put a sheep fence up along that side, because otherwise you would be walking one step from your death looking for a ball in the rough. If they'd made the fence a lateral hazard, you'd still have the option of finding your ball and hitting it, or falling to your death trying to find it. But, since that's the way the hole is marked, that's the way those guys should be playing it! Anthony Kim missed right, O'Hair missed left, so Anthony wins.
And, yes, I've won the hole by hitting 4-irons and 6-irons to get there in 4 and make a bogey. You're right that it's no cinch to hit a 4-iron on that fairway three times in a row if the wind is really blowing, but it wasn't blowing that hard for the final round this year, as far as I could see.
Rob:
I only saw the last few holes this year, and didn't see any bunker shots other than O'Hair on 14 yesterday (took him two to get out, after his approach just barely got in the bunker, and he had no stance), and Anthony Kim in the back bunker on 15. But there may have been more, they just tend not to show those shots from the guys that are out of contention.
There really aren't many bunkers on that back nine, anyway ... I think there are 26 or 27 of them, but #10 only has one at the back left of the green, #12 doesn't have any, and #15 has only the bunkers at the green. I remember this distinctly because Mr. Robertson thought we should have more bunkers, but I just didn't see any good places to put any ... pretty much all of them are hanging off the edge of the world.