1. Yes, I think that extraterrestrial life exists. There is too much space in the universe to be the only one.
3. There is a movie I like. The name of it is CONTACT. That is my reason to run SETI@home.
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.