Unfortunately, you did miss one. There is Brushed metal, aqua, and unified toolbar.

Many of the apps you listed are not in fact brushed metal, but a unified toolbar style that apple is moving toward (mail for example). It's much like brushed metal with a few key differences.

Now, it isn't completely brought over yet, but it's the transition that they're going for. Aqua and Brushed should be the exception by the time 10.5 comes around (of course, I can't speak for all 3rd party apps. It's not apple's problem that they don't update)