I believe that anyone not believing in intelligent life on other planets is quite egotistical. I believe humans will "discover" it when they finally make their prescence known. Whether it be for the good of Humanity or not I cannot say. However, like Perry Farrell once said, "We'll make great pets".
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.