1. Yes, they will visit us, cause we are too young to visit them...
2. Why should we try a contact? We have much to lose, we are very primitive for a race that crosses the space (real technology achievements need thousands of years)
Why do people think that we can get anywhere? the only thing we've done is to visit our tiny moon...
3. This is like asteroids... I'd prefer to know that they are there and coming than knowing nothing
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.