Do you think extraterrestrial life exists?
Absolutely.
If so, when and how will humans discover it?
By accident and when we least expect to.
What are the possible benefits and dangers of such a discovery?
More funding will be available to projects like this, the downside being less time and money will be spent protecting areas on earth that are fragile.
Should humans transmit a beacon for others to find? If so, what information should we send?
I am not sure we are mature or responsible enough yet. We can't even live peacefully with our earthly neighbours so how will we cope with extra-terrestrial life? I don't know what info we could send, but it would have to be honest, to contain the good and the bad about ourselves.
Why do you run SETI@home? What are your views about the project? Any suggestions?
Because I can. What a simple and practicle solution to an annoying problem. I will get back to you on that one! | 
