SETI@home is a great useful Project which I really like to support.
Extraterrestrial life exists somewhere and Seti gave us the possibility to find it, so keep it going.
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.