I run SETI because it is a painless and easy form of charity. I also run other distributed computing projects. I also believe 1) we are not alone and 2) we are probably barking up the wrong tree. I suspect we will not be allowed congress with others until we demonstrate that we can get along with ourselves without demanding monolithism in thought, theology and culture.
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.