I bought the black anodised nuts. If I recall correctly, what happened was this... I bought the wheels and the nuts together, and the centre caps subsequently. When buying the centre caps, I had assumed they would cover the entire central area (i.e. including where the nuts were) and couldn't understand how this would work, as the nuts appeared too long to allow centre caps to fit over the top. I guess I must have had this conversation with Darryl, hence his recollection here.
But it turned out that the centre caps are tiny and only cover the middle couple of inches or so, as shown in the pic Darryl linked to earlier. So, it wasn't an issue at all.
All that said, I can't recommend Weds wheels or the anodised nuts at all. Despite looking after the wheels EXTREMELY well (i.e. washing them at least weekly with two bucket method, always using natural fibre mits, never letting any salt stay on them, and sealing them with JetSeal109 with every wash), the chrome started to flake off after just a few months. Everyone I've spoken to who knows something about wheels says it's clearly down to a substandard plating process from Weds, rather than, say, exposure to harsh conditions.
The chrome plating has been slowly been surely coming off the spokes, but fortunately only on the surfaces that perpendicular to the tyre wall, so under casual scrutiny, they still look perfect. I've decided that if it gets really bad, I'll just have the wheels resprayed in black.
Furthermore, the nuts started to corrode after about the same amount of time, with all the anodised black coming off them.
I wouldn't really mind if the wheels had only cost a few hundred quid and if the nuts only cost £20 or so, but these wheels and nuts were FAR more expensive.