AWS Now With MySQL Support
By pelegri on Oct 27, 2009
Quoting from the RDS site, this is how Amazon is presenting the value prop:
Amazon RDS automatically patches the database software and backs up your database, storing the backups for a user-defined retention period. You also benefit from the flexibility of being able to scale the compute resources or storage capacity associated with your relational database instance via a single API call. As with all Amazon Web Services, there are no up-front investments required, and you pay only for the resources you use.
More AWS info at Products, FAQs and elsewhere at AWS. Overall, this is a good move from Amazon, and the whole space is going to continue to change rapidly in the near future, see for example AWS@Oracle and Oracle@AWS.