Unfortunately, the main reason I run SETI@home is not to find extraterrestrial life. Although I do believe that it exists, I am more interested in the aspect of distributed computing and how successful it will be. I believe that if this proves to be successful, then many more similar programs will follow.
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.