1º yes i think that extraterrestrial life exists...., is a question of persistence .......
2º why not if we humans are looking for... why the hell they can´t be looking for us?
3 because i believ in this cause and i hope that seti@home get think discover extraterrestrial life with other proccess like light that is tranmit over the galaxy....
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.