I believe in extraterrestial life. So it's just a question of time they will find (or return to) us or we will find them. The search for extraterrestial life has no deadline. The deadline could be only the end of all human life on earth. Therefore I suggest we never, never and never stop searching!
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.