When I saw the thread title, I actually thought that by some fluke the Cubs were going to the Series instead of the Sox! I'm a Cubs fan all the way. In fact I saved the cover of Sports Illustrated from two years ago that predicted the Cubs winning the World Series. The Sox, ehhh, I can leave 'em. If they win the World Series, I won't feel anymore excited than if any other team did.
I agree with docetboy. You're not allowed to like both, and I haven't yet met people from Chicago who feel otherwise. It's like supporting the Packers AND Bears.