Amazon's web services business has sparked a number of business opportunities. Using EC2 and S3 is not especially easy for a beginner, but scalable web architectures aren't a place for the weak hearted geek.
Enter Scalr. This is an open source project meant to make building a scalable, fault tolerant system on Amazon's services easier.
If that is still too hard then take a look at scalr.net a service that for $50 a month will manage your scalr instance for you. (You still have to pay all the applicable Amazon charges.