What would you do with 1,000 free EC2 hours on AWS? 1,000,0000?
cperciva: I don't know what I'd do with 10^3 hours, but with 10^6 hours I'd calculate 5 trillion digits of Pi -- until now this sort of computation has always been done on supercomputers, but there's no reason why it shouldn't be possible to do it on EC2.