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BOINC is still around and supports a variety of projects including Einstein@home (search for neutron stars using gravitational waves), World Community Grid (search for the cure for cancer and other diseases), milkyway@home (model the Milky Way galaxy), and lots of others. I still miss seti@home though.

I may have another look at what is out there. It does seem a lot of people have fond memories of SETI.

Ah yeah, that's it!