Wouldn't SETI benefit greatly from 64-bit, all the extra registers and dual core by porting this to the x86-64 processors? Too bad it isn't written to take better advantage of the spare cycles on my Athlon64 X2 4400+ and Athlon64 3200+ machines.
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.