Dare Obasanjo aka Carnage4Life - REST API Design: Invent Media Types, Not Protocols and Understand the Importance of Hyperlinks
http://www.25hoursaday.com/weblog/2008/10/24/RESTAPIDesignInventMediaTypesNotProtocolsAndUnderstandTheImportanceOfHyperlinks.aspx

The key thing to remember is that REST is about building software that scales to usage on the World Wide Web by being a good participant of the Web ecosystem. Ideally a RESTful API should be designed to be implementable by thousands of websites and consumed by hundreds of applications running on dozens of platforms with zero coupling between the client applications and the Web services. A great example of this is RSS/Atom feeds which happen to be one of the world's most successful RESTful API stories.