A nice little touch in the EPEAT Gold certified Apple Macbook and Macbook Pros: The Energy Saver icon has changed.
It went from an incandescent bulb - aka a "heat bulb", since they're so much more efficient at producing heat than light - to a compact fluorescent bulb (CFL). The next step will probably be a move to a LED bulb in a couple years... For more on the environmental impact of the new Macbooks and Macbooks Pro, see our post on about it. Also check out our guide on how to green your lighting. Via TUAW