Another fan of the 3m spoke straws. The static shots don't really do them justice, when the wheel is going round they are more a wall of reflectance, so the weight weenies can get away with them every few spokes and have much the same visual impact as sticking a straw on every spoke.
I'm not sold on the need to put them on spokes on both sides of a wheel, there's nothing in the middle to stop them being visible from either side if just put on one side.
To whoever mentioned the Brompton, I have the 3M straws on my Birdy too, I've just cut them down a bit, for personal preference, the full length ones fit on an 18" wheel.