I enjoy working, and working with computers. I have been playing with computers since I was 13 when I got my first computer--A Commodore VIC-20. In 2005 I am 36. WOW. Computers are meant to work. This is the best application I can think of to press idle cycles into productive, important work.
SETI@home and Astropulse are funded by grants from the National Science Foundation, NASA, and donations from SETI@home volunteers. AstroPulse is funded in part by the NSF through grant AST-0307956.