>In a typical 40-hour work week, what is the minimum number of "productive" hours you would consider acceptable from an employee?

Zero. Anything more than that would probably get me fired.

I work 9am to 5pm. Most of the work I do gets done sometime between 8pm and 1am.

I guess I could be more productive during the day, but when will I have time to realize my dreams?
http://www.despair.com/gettowork.html