If you're in a real hurry to find
extraterrestrials (or show off the power of your
G3/
G4), I've heard that running the
SETI@home client through
Mac OS X's terminal gives the speediest result you can hope to get on a Mac.
I like using the pretty display and password to keep certain people away from my computer when I'm out of the room, so I have no personal experience with this technique.