SETI
While it is true that Search for Extraterrestrial Intelligence is where SETI gets it's name from, there is more to the program than just listening for ET to make a phone call. Many people forget that SETI was and still is the groundbreaker in the field of Distributed Computing Technology. They were the ones to show the world that it was possible to draw 3.5 million people together and work on a project successfully. The data being analyzed has other information to giveup to the scientific community. The data frequencies currently being analyzed reside in and around the natural frequency of Hydrogen, and the analysis can in the future pointout anomolies occurring in this frequency range that may help astronomers better understand processes taking place in the universe.
Any of the many Distributed Computing Projects is a worthwhile use of idle cpu cycles, it needs to be a matter of what interests you as an individual as to what project you get involved in. I have my preference, but that is me, you need to decide what is right for you, but no matter what your choice, putting your idle cpu cycles to some use is definately a "GOOD THING"!
SkyHook