the problem with simple ideas for aws, is that you need to either pay via data, bandwidth or instance hours.
i would love to pay for process hours on some software. i wish there was standard way for aws customers to exchange services based on process time.
in all likelihood amazon has done some of this work for simpleDB, but it would be great to build a piece of code on one linux box and then to sell that time to other users.
i could think of a number of situations where I would love to pay for process time instead of instance time. email, databases, caches, load balancing, etc...
http://fallenpegasus.com/code/mysql-awss3/