Why REST Failed - "ERH complaining (rightfully) that browsers (and web presentation specs) should support PUT and DELETE out-of-the-box. I couldn't agree more. And yes, the title is unnecessarily inflammatory." | http://cafe.elharo.com/web/why-rest-failed/
Carrot Vs Orange discusses the benefits, drawbacks, and arguments for or against Pie Api approaches "HTTP using GET/POST to a single URI" (Carrot) vs. "HTTP using the REST Architectural Style" (Orange or simply REST). http://intertwingly.net/wiki/pie/CarrotVsOrangeDiscuss