Grid computing is 'always on'

Distributed computing is an excellent example of how an 'always on' culture can realistically contribute to positive change. I support BOINC (Berkeley Open Infrastructure for Network Computing), and groups that I've contributed to include:

• SETI - the Search for Extra-Terrestrial Intelligence
• Folding @ Home - computing valid candidates for medical treatments
• World Community Grid - search for solution to diseases such as cancer and dengue fever
• Climate Prediction Net - developing models of worldwide climate change

I encourage any of you who have computers that are sometimes just sitting around idling to participate in community projects such as these - there are scores more to choose from.  All it takes is the time to set the software and accounts up, and the will to 'loan' your computing power to a variety of worthy causes.