1. I guess there is extraterrestrial life that will be discovered in a few centuries. If those aliens are nice to us they'll be our new allies,
if not we'll perhaps have to fight against them :-(
2. yes, we should send some information about the human race.
3. i run seti@home because i'd like to be one part of a big community that found alien signals.
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.