Software developers working too much lead to negative returns as they add more bugs than they fix (or add features). And sleep-deprived coding has lead to more architectural "bite us in the ass" problems than any slightly faster feature output.
That's why I have a cap at ~40 hrs/week. Don't work any more or I'll get mad.
And I believe in the "Results Only Work Environment" (http://www.gorowe.com) - there is no clock; folks "working late" or "coming in early" have nowhere to hide. Only the people working at a sustainable pace and consistently delivering high-quality, working software are rewarded.
And we're hiring: http://fundinggates.com/jobs