Amazon has announced the launch of its cloud-based simple notification service that will allow Web developers to create a push notification system for their applications. The new service, Amazon SNS, will deliver messages to users across a number of different formats, including E-mail and HTTP.

Amazon SNS provides a simple Web services interface that can be used to create topics that developers want to notify applications or people about (such as smartphone applications), subscribe clients to those topics, publish messages, and have the messages delivered over the clients’ protocol of choice. Developers who use SNS will be charged only for the services they use (all true cloud services are scalable and flexible).

Customers will pay no charges for the first 100,000 requests, no charges for the first 100,000 HTTP notifications and no charges for the first 1,000 E-mail notifications, according to Amazon Web Services. After those limits are reached, charges will be $.06 per 100,000 API calls.