WorldChanging is on vacation this week, and is running some of its best entries. And this one really is: The Rise of Bright Green Computers is an excellent overview of computers and sustainability, with info and links galore. Here's a paragraph from the intro:

The modern world's greatest tool is among our most disposable and resource-heavy. Performance-wise, computer design has progressed staggeringly well and astonishingly fast. But looking at it from a green perspective, the work has barely begun. When our laptop dies and we toss it, it either rots in a landfill, or children in the developing world end up wrestling its components apart by hand, melting toxic bits to recover traces of heavy metals. Did someone forget to design for them? And of the $250 billion per year spent on powering computers worldwide, only about 15% of that power was spent computing--the rest was wasted idling. Did we really get what we paid for?