Open Source Client libraries for Amazon Web Services are available to build AWS manager console.

http://code.google.com/p/typica – Java
http://code.google.com/p/ctypica/ – C
http://tarzan-aws.com/ – PHP
http://code.google.com/p/php-aws/ – PHP

Now comes AWS manager built using the above libraries:

DirecEC2 for iPhones and iPod touch
http://awsmanager.com/
http://cloud42.net/

What about setting up a Cloud42 application on a webserver and offer the services same with Ylastic? 🙂

Amazon EC2 Management console for users who will win?
What if to include the feature to easily manage 1000 servers using iPhone? 🙂

Ylastic offers application for iPhone and iPhone and Android based smartphones. But I bet they built their own client library for their application.