Are we alone in the solar system? Probably. Are we alone in the galaxy? Maybe, but I doubt it. Are we alone in the universe? No way! At the rate we are discovering distant planets, the odds are more likely that we are not alone.
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.