Hey! Thanks for the link. I don't really want a completely PC-like box (I have a mini, and want to upgrade that), but I do want something that can be expandable somehow.

I'm pretty sure I won't get it (or worse, that I'll have to pay through the nose for it at Mac Pro-grade prices), but I'd really like to get a more modular Mac.

I don't think that Apple will do it, though. Jony "VP of Narration" Ive has a thing about unbroken surfaces, and even though I like Apple's overall aesthetics, I don't think there's any way a modular system fits into the Mac "look".