Given the vastness and the almost infinate possible combinations, it stands to reason that we can not be alone in the universe. The true test is will be to be patient enough to figure out how to find or contact 'them'...
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.