Apparently the group that Mortimer Adler founded to promote the original Great Books collection put out by Brittanica now has a pre-K through 12 homeschool curriculum.
I must say, I'm fairly impressed with their reading list. One of my concerns about some of the classical curriculum groups has been that they don't seem to be ambitious enough with what they have students read in the older grades. You can't fault this group for lack of ambition, though.
Though I think I'd go further into literature and not as far into philosophy. I think there's a gread deal of value in having a high schooler read books like Paradise Lost, Brothers Karamazov, Dante, and a number of other longer works of literature that this Great Books program skips than there is in having a high schooler tackle Hume, Kant and Locke. I suppose this violates the very spirit of the great books program, but it seems to me like those three especially (and modern philosophy in general) requires a more general education in philosophy before it's worthwhile reading. (I first read them in college, and felt like I didn't actually have enough background then, though perhaps now I'd do better.) Literature, however, speaks a more universal language -- and this particular reading list seems pretty thin on post-Classical literature, except for a raft-load of Shakespeare.