You see it all the time: Long hair with a feather extension just slightly visible, all chic and trendy. If you've seen it in short hair, though, you know it's got the same effect and can be even more dramatic.
This look is probably best for hair that's chin- to shoulder-length, because you do want a bit of blending (and it needs something to grip). Make sure the feather isn't too long -- an inch past your ends is a nice look. Since your ends are closer to eye level, the feather will be easier to spot.