Heh...that's a good point. Another big obstacle for me has just been overcoming laziness and actually driving out to the bookstore to pick it up. I'm also trying to get through a couple other books that I started and am trying to slowly chip away at. But, I'm definitely picking up Freakanomics soon.
edit: for anyone interested in seeing what the book is like, you should check out the author's blog:
http://www.freakonomics.com/blog.php