I've been following AWS since the beginning and used it for a number of things myself. Tonight, while reading an article over at TechCrunch I found this very cool service for self-load-balancing self-scaling web services. This seems to have potential for a variety of purposes. Since I haven't actually tried it yet personally I'll just point you there for now. I intend to spend some time trying this setup out very soon. Enjoy!

Resources:

ScreenCast: http://weoceo.weogeo.com/video/

Main Site - http://weoceo.weogeo.com