I love the new MacBook and MacBook Pro. Apple has a video about how they mill the case for the MacBook (and by extension, the MacBook Pro and MacBook Air). You have to recycle about a half to two-thirds of the aluminum you have in the original block of aluminum, but you have a case that can then be built by any metal working factory in the world (even the US!), and is a lot greener than a slab of plastic.
I'd want one, but work lets me use a year-old MacBook Pro, and that's as much as I need. The family and I might squeeze enough out to buy a MacBook for Christmas next year for homeschool.