SETI@Home is a distributed computing project similar to the encryption cracking efforts run by distributed.net.
The SETI@Home concept is to distribute radio telescope data gathered by
the SETI project (SETI = Search for Extraterrestrial Intelligence) to
thousands of computers over the Internet so that the data can be
analyzed for signals that might be of intelligent origin. The client
software runs in the background when your computer is idle. An OS/2
client of "boinc" version 6.6.29 is now (6/19/2009) available. If you run it, join the OS/2 team.
Source: OS/2 Warp News and Rumors