Journal: 40 hours a week of productive programming?

I've been reading Joel Sposky's new book, The Best Software Writing I: Selected and Introduced by Joel Spolsky and the article from ea_spouse. Let's talk about the 40-hour programmer work week. The shelves are replete with software engineering books which also claim programmers' productivity drops past a certain point. Thus smart managers are encouraged to limit their programmers' time in the office to 40 hours a week.