Whether or not one believes in the SETI program, using it wouldn't make sense to not do. Even if it turns out there's nothing out there, adding more computational power would bring about the fact all that much sooner.
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.
