I run SETI because the kind folks over at http://ocforums.com on their SETI team helped me build my first computer. That started 2 addictions at the same time :) Building Computers and Crunching SETI.
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.