http://freemangoestech.blogspot.com/2008/03/world-community-grid-join-in-and-help.html

World Community Grid’s mission is to create the world’s largest public computing grid to tackle projects that benefit humanity.

Our work has developed the technical infrastructure that serves as the grid’s foundation for scientific research. Our success depends upon individuals collectively contributing their unused computer time to change the world for the better.

A very cool article talking about the World Community Grid which runs a number of projects which you can donate your computer time to, it’s always good to see the technology being used to solve a challenge, to add value. In this case you can donate some of your computer time to a project that interests you.