I was thinking some more about Mike Hyatt's "e-Book Clubs" prediction, and went back to re-read it.
On a second read, I wonder if I was using a narrower definition of a book club than Mike is. I made the assumption that the publisher would select the books for the book club member.
I now suspect that he merely meant that the member would agree to purchase X number of books for a certain price--similar to the "Bundled Books" prediction.
That actually makes some sense to me.