Hehe, networkman, not paranoid are ya?!?!?
Although folding@home has merit, unfortuntely from what I have heard, its clients and the way it operates doesn't.
I have mixed thoughts on SETI. Its a good project, but its a looooooooong shot. That hurts it a little.
But hey, your CPU cycles are going wasted anyway so wasting them with any project you like doesn't bother me.