If *Mail* is digital hub, so is Mac OS X. And Sherlock? Well, maybe. It's inconsistant, and I think consistancy should be higher up. Of course iTunes would look bad in Aqua, but then they would have designed it differently if they wanted to apply Aqua to it, right?
I don't understand how they could start to use a different theme for *any* application at all. I think QuickTime was the first.
But really, FinalCut Pro and DVD Studio Pro have yet another theme, and although it makes sense there (it's much cleaner to look at than Aqua), this tells me that stuff like Photoshop or Word could also make use of *one* *single* professional and productive theme for the whole experience. I actually like Aqua. It's the missing consistency even at Apple applications that make me feel sick a bit.