In a blog by Matt Ryan on Lockergnome.com he talks about how you can help in the search for extra-terrestrial life by just having your computer available to crunch large amounts of data.
He names the following programs:
2. Galaxy Zoo
While many people may not want to know or help to find out if their is extra-terrestrial life you check out he article on lockergnome.com. It is at:
Chris Pirillo also did a video on YouTube about this article
Please Check out all of the other articles on lockergnome.com. It will benefit the Lockergnome community which in turn will help me, because I am part of it.