From the site: An integrated interface to current and future infrastructural services offered by Amazon Web Services. Currently, this includes:Simple Storage Service (S3),Simple Queue Service (SQS),Elastic Compute Cloud (EC2),Mechanical Turk, and SimpleDB
MyBantu is an interesting little mashup, available as an iPhone app, an Android app, and a website. Its goal is to make shopping for anything, especially restaurants and movies, easier and more social. It uses Yelp API, Netflix API and various others to make it happen. It's very similar in idea to Siri, the "ultimate mashup" that Apple later gobbled up in the largest mashup acquisition ever.