I recently came across an interesting reference from the US Economic Policy Institute. They publish a regular report entitled 'The State of Working America'. A lot of their work is free at their site (http://www.stateofworkingamerica.org ), though you have to purchase their book to get the full gory story. Here's a little tantalizer: Guess which year the USA finally surpassed Japan in terms of average hours of work. Wasn't there some of sort "Japanese disease" that basically translated as "death due to overwork" ? The answer is the year 2000. The situation for American workers in comparison to others of the OECD has only been getting worse since then.
Have a look.