Even though Amazon SimpleDB is still a beta product, progressive developers are already learning about it and building highly scalable applications. In fact, we just released a pair of case studies.
ShareThis has been deployed to over 30,000 web sites. Faced with rapid growth, the team considered three storage options and chose SimpleDB for its responsiveness, reliability, zero software cost, minimal staff costs, and low barrier to development. They used EC2, SimpleDB, S3, and SQS to build a complete loosely coupled and fault tolerant system in the cloud, with an estimated savings of $200,000. Read all about it!
The Alexa Site Thumbnail Service uses SimpleDB to store intermediate status and log data, allowing them to store and deliver millions of thumbnails. They store over 12 million objects in SimpleDB and perform over 5 million queries every day. Read all about it!