I recall I was reading the Change the world or go home post from Dare Obasanjo and being a bit confused not about the content (which was interesting and thought provoking as usual) but about the 'or' bit in the subject.
I was asking myself, would it make sense to say "Change the world *and* go home" :-) ? I believe all of us working with the Open Source are changing the world every day, then we go home in the end of the day, and then we are back at it the next day, changing the world with our individual contributions, negligible in the scope of the big picture.
Of course, "or" had the meaning in the Dare's post. But I kind of like 'and' more :-)