I am a earth sciences teacher in Chung-Hua Senior Highschool in Taiwan. SETI is the most directly project that everyone can directly involved. It's a project that I encourage my students to join this project. Just download SETI@home and rock-n-roll!!
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.