SETI@home gives me a reason to rebuild old computers I find next to the dumpsters. Give me an empty box and I'll find a way to make it run SETI.
Not only to search for E.T., but also to help push this type of science forward in general.
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.