Little do you earthlings know, we Valdascans have been living among you for years. I've joined the SETI project simply to get messages from home. This is why my average CPU time per work unit is so high - I'm running complex alien software (on your primitive earthly hardware) to decipher messages from my 'family units' back home.
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.