Has anybody tried generating bitcoins on Amazon EC2 instances? If you have, how many coins/day are you getting (and on what type of instance) ?
If nobody has already, I might do some experimenting and get some back-of-the-envelope estimates for $/bitcoin using Amazon EC2 spot instances.
(I've had zero luck generating any coins over the last week on my couple-year-old Macbook Pro, which only does 150-200K hashes per second)