Ha! I am a big advocate of using built-in objects and methods. I think sooner or later most of us find a need to implement this solution.

This was my take on it, hope it helps:

function uniqueObjectList(objArray, prop) {
	return objArray.filter(function(filterObj, pos, thisArray){
		return thisArray.map(function(mapObj){
			return mapObj[prop];
		})
		.indexOf(filterObj[prop]) === pos;
	});
}