Save the World

IBM and others are setting up a world wide 'grid' of spare computers to be used for 'doing good'. Basically, whenever your computer is sitting idle, this program will do some work to solve a problem. By having huge numbers of PCs hooked into this grid you can solve some large problems.
World Community Grid want to do this to solve problems such as Human Proteome Folding, which can be used to fight diseases (viruses I guess).
Currenlty it's only available for Windows, but I would encourage people to give it a go - can't hurt now can it?