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"Amazon has just launched a cloud-based simple notification service (SNS) for web app developers. The new service allows developers to send push notifications to their users or applications via a number of protocols, including email and \u2014 perhaps in the near future \u2014 SMS.\nHere's how it works: Developers identify up to 100 topics or types of events, decide who can publish or subscribe to messages, and then publish messages. Amazon SNS will then automatically notify subscribers and deliver the content. And, like the rest of Amazon's cloud services, developers pay only for the services they use; services are flexible and scalable.\nThere's even a generous tier for free use of the service. According to Amazon's site, \"Each month, Amazon SNS customers pay no charges for the first 100,000 Amazon SNS Requests, no charges for the first 100,000 Notifications over HTTP and no charges for the first 1,000 Notifications over Email.\" \nAfter those limits are reached, Amazon will charge $.06 per 100,000 API calls. The data transfered in (i.e., messages the developer publishes) will be $.10 per gigabyte as of July 2010. For information on how much SNS would cost for your applications, see Amazon's handy dandy calculator.\nInterested developers and others with questions should also check out this Reddit thread, where a developer from the SNS team is answering questions.\n\n\nFor more technology coverage, follow Mashable Tech on Twitter or become a fan on Facebook\n\n"^^<http://www.w3.org/2001/XMLSchema#string>
<http://mashable.com/2010/04/07/amazon-sns-developers/>