I got my black buttons in. They look pretty good. The only problems are that the black is a slightly different "shade" of black and you can just barely see the tool marks from the mould (although probably not if they're more than two inches from your face). Pretty slick.

They still look weird to me, probably from having lived with the gray ones for six years, but I think they're pretty cool.

Oh, I did have a very minor problem with what looked like the remnants of a sprue on the top button. It wanted to catch the lens when I pushed the button, so I had to pare it off myself. Not bad at all, but folks might want to check that before they screw everything back down.