(I've searched around ET for posts on this subject, but couldn't find any. This is suprising, considering that us traders have modern, fast PCs which keep running 24/7, but only use them a few hours per day.) We all have probably heard about the legendary SETI@Home by Berkeley Univ (the mother of all distributed computing projects, searching for extra-terrestrial intelligence) which has over 5 MILLION users. The hottest project right now is Folding@Home, by Stanford Univ The DMOZ page http://dmoz.org/Computers/Computer_Science/Distributed_Computing/Projects/ lists over a 100 such projects, which request idle CPU time, for reasons ranging from finding a cure for cancer or AIDS, to building the latest CERN particle accelerator. Some are run by companies although it's not always clear at first, e.g. in the End User License Agreement you sign (online) to join Wold Community Grid, you'll see that you're actually signing an agreement with IBM. I've spent several hours trying to clear things up a bit for myself (as I wanted the best bang for the buck in performance, security and configurability) and I've summarized everything at: http://www.hyper.net/dc-howto.html If you are, or think about, donating your idle CPU time to projects that benefit humanity, you may want to read it. Happy New Year 2006.