"Green" is such a sales pitch, without much substance. Recycling some parts is important. But carbon offsets don't actually offset much energy usage at all. In fact, in subsidizing other forms of energy, people probably use more energy from them. Even the benefit of a low-energy computer is very small when compared to the biggest consumers of power in the home: furnace, AC, water-heating, etc..
But I suppose the lesson is that you can leverage misconceptions.
And don't get me wrong -- I love tiny computers. An old MacMini makes a perfect media PC. Bittorrent download boxes needn't be large also. I hope they have a version without the subscription fee.