The space would have been a huge wastebasket if it is only us humans using it... There must be someone(something) out there... We just have to find out where and who (or What)...
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.